The 10 plagues of Egypt: meaning and scientific explanation

The ten plagues of Egypt (in order) are: turning water into blood; plague of frogs; mosquito infestation (lice or fleas); pest of horseflies (flies); cattle plague; ulcers; fiery hail; locust plague; darkness and death of the firstborn.

The plagues of Egypt were a series of misfortunes that, according to the Bible, fell on the Egyptian kingdom after refusing to liberate the Hebrews. The account is found in the Book of Exodus, chapters 7 through 12, in the Old Testament.

The meaning of the plagues of Egypt focuses on three fundamental aspects:

• First, the revelation of Yahweh as the only God, Lord and Judge. Divine intervention in favor of the liberation of the people of God discredits the polytheistic religion, undermines the bases of the political and economic power of the authorities and expresses the sense of divine justice and freedom.
• Second, the presentation of the worshipers of Yahweh as the chosen people. The story states that Yahweh listened with mercy to the laments of his people, favored them, protected them from the plagues and guided them on their way.
• Third, the presentation of misfortune as an instrument of moral correction in the face of the persistence of sin. It is a condemnation of sin committed consciously, deliberately, and stubbornly. Pharaoh's downfall lies in his pride and arrogance, which prevent him from listening to the prophet's warnings and amending his actions.

To understand in detail, let's look at a summary of the plagues of Egypt, their scientific explanation and the biblical meaning of each one separately.

1. Conversion of water into blood

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Summary of the conversion of water into blood

In the first interview with Pharaoh, Moses demanded that he free the Hebrews and let them go to the desert to worship God, just as he had ordered. Otherwise, God would turn the water into blood, but Pharaoh did not listen.

Then Aaron raised his staff and the waters of rivers, lakes, and vessels turned to blood. Seeing that the Egyptian priests could imitate him, Pharaoh downplayed the phenomenon.

The passage is narrated in the Book of Exodus 7, 14-25.

Scientific explanation

Some experts claim that the transformation of the Nile into blood was a pollution phenomenon that poisoned the water and gave it a reddish appearance. It is possible that this contamination was due to an excess of red algae, which would have released toxins, compromising the potability of the water.

Meaning of the conversion of water into blood

From the biblical point of view, the pollution of the waters symbolizes:

1. The first demonstration of the power of Yahweh in front of the Egyptian idols and the Pharaoh, who pretended to be divine. The natives believed the gods Osiris, Hatmehyt, Jnum, Hapi, Satet and Sotis protected the Nile.
2. A punishment for the massacre of the Hebrew children. Before the plagues, Pharaoh ordered the death of newborn Hebrew males, who were drowned in the Nile or dumped as crocodile food.
3. A blow to the political and economic power of Egypt that wounded the pride of Pharaoh. The Nile was the economic center and the main communication route of Egypt.

2. Plague of frogs

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Summary

Moses and Aaron warned Pharaoh again that God would cause an invasion of frogs if he did not let them go. Before his second refusal, Aaron extended his hand over the waters and the frogs invaded the territory.

The Egyptian priests followed suit. Pharaoh asked the brothers to ward off the infestation, in exchange for allowing them to offer their sacrifices to Yahweh in the desert. The brothers begged Yahweh and he agreed, but Pharaoh did not keep his word.

The passage is narrated in the book of Exodus 7, 25-29; 8, 1-11 (Catholic editions of the Bible) or in Exodus 8: 1-15 (Christian non-Catholic editions of the Bible).

Scientific explanation

Scientific studies describe a phenomenon called "frog rain." On some occasions, after storms or phenomena that alter the conditions of the aquatic habitat, the frogs come out en masse and disperse in search of food, destroy crops and generate other problems. This could have occurred as a consequence of the reddening of the Nile.

Meaning of the plague of frogs

The plague of frogs symbolizes the breakdown of the Egyptian religious normative system and, again, a blow to the kingdom's agricultural economy. The first is because frogs were considered sacred, so they could not be exterminated. Growing out of proportion, they were forced to break their religious laws.

3. Plague of mosquitoes, lice and fleas

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Summary

The third plague was not preceded by a warning, but Yahweh ordered his execution when he saw the attitude of Pharaoh. Aaron struck the ground with his staff, and immediately a cloud of mosquitoes, fleas, and lice appeared everywhere.

The Egyptian priests tried to imitate the prodigy for the third time, but they did not succeed. It was then that they recognized the power of Yahweh. But Pharaoh did not want to listen to Moses or his own priests.

The passage is narrated in the book of Exodus 8, 12-15 (Catholic editions of the Bible) or in Exodus 8: 16-19 (Christian non-Catholic editions of the Bible).

Scientific explanation

Experts believe that it was an infestation of mosquitoes, lice and fleas at the same time. These insects are attracted when there are not good hygienic conditions, which could be a consequence of the previous pests. For example, the accumulation of dead fish and other animals on the banks of rivers and lakes and other waste. These pests cause diseases that can kill people and animals.

Meaning of the plague of mosquitoes, lice and fleas

On the one hand, the plague of mosquitoes represents the first split between the political and religious power of Egypt, since Pharaoh refused to listen to his own priests, who had been persuaded of the power of Yahweh.

On the other hand, it discredits the Egyptian religion. First, because it compromised the priestly caste, unable to fulfill its functions because it was in a state of impurity. Second, because it affected the abundance protected by the idol Geb, and the control of wild animals (insects), protected by the infantile form of Horus.

4. Plague of horseflies

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Summary

Back before Pharaoh, Moses and Aaron warned him that Yahweh would send a plague of horseflies (flies). This time there would be a difference: the Hebrews would not be touched to make him acknowledge that God blessed them.

When the plague broke out, Pharaoh agreed to allow the Hebrews to offer their sacrifices in the desert, provided they did not stray too far. Yahweh removed the plague and saved Egypt, but Pharaoh broke his promise again.

The passage is narrated in the book of Exodus 8, 16-28 (Catholic editions of the Bible) or in Exodus 8: 20-32 (Christian non-Catholic editions of the Bible).

Scientific explanation

Some experts believe that the horsefly infestation was a reaction to variations in climate that occurred in Egypt. Flies and other similar insects are characterized by causing bites in animals and people that can cause serious diseases. In fact, horseflies have the ability to generate tumors.

Meaning of the horsefly plague

The plague of horseflies (flies) can be interpreted as a symbol of the corruption of sin and a reminder of human mortality. It can also be an affront against the deity Dua-Ur, in charge of purifying the face of Pharaoh. But above all, this passage is an exposition of Yahweh's solidarity with his people of worshipers.

5. Cattle plague

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Summary

The brothers Moses and Aaron returned to Pharaoh's presence, warning him that if he did not free the Hebrews, all the cattle would suffer a plague. mortal.

In order to recognize the presence of Yahweh among the Hebrews, their livestock would remain healthy. All the cattle of the Egyptians suffered the consequences, but Pharaoh did not yield.

The passage is narrated in the book of Exodus 9, 1-7.

Scientific explanation

Scientists suggest that the disease that decimated the animals may have been rinderpest. This disease is caused by a bacteria called Yersinia pestis, transmitted by insects such as flies. Five thousand years earlier, the disease would have reached Egypt from Asia through trade routes. Given the sanitary conditions since the beginning of the plagues, it may have found a conducive environment to spread.

Meaning of the plague of cattle plague

The cattle plague represents, on the one hand, another blow to the economic security of the Egyptian kingdom at that time. On the other hand, it marks the fall of Hathor, a goddess who is represented as a cow with a sun disk and who is associated with renewal and fertility.

6. Ulcers

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Summary

God commanded Moses and Aaron to appear before Pharaoh again, take a handful of soot from the furnaces and throw it into the air. This dust spread through the air and caused ulcers on all the natives, including the Egyptian priests, who could not face the brothers. However, Pharaoh did not agree.

The passage is narrated in the Book of Exodus 9, 8-12.

Scientific explanation

For this plague there are two theories or explanations. The first argues that skin ulcers were caused by toxic gases released by decaying livestock.

The second maintains that it was a proliferation of smallpox, caused by a bacterium called Staphylococcus aureus. Indeed, there is evidence that there was an outbreak of smallpox in Egypt more than three thousand years ago. Such evidence is found in some marks found on the mummy of Pharaoh Ramses V and other mummies of the time.

Meaning of the plague of ulcers

The ulcers can be interpreted as a punishment to the Egyptians for prohibiting rest to the Hebrews (including the right to scratch). The Egyptians also forced them to prepare their bath with hot water, which was very laborious. By contracting the ulcers, the Egyptians suffered irreparable itching and were unable to take a bath.

7. Rain of Fiery Hail

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Summary

In a new interview with Pharaoh, Aaron and Moses warned him that a thunderstorm with fiery hail would strike Egypt. If they wanted to save themselves, they had to take shelter indoors, but not everyone believed. Thus the flax and barley were destroyed, but the wheat and spelled were saved because they had not flowered.

Pharaoh called the brothers and acknowledged their sin. They interceded for him and Yahweh stopped the storm. However, Pharaoh held the Israelites captive.

The passage is narrated in the book of Exodus 9, 13-35.

Scientific explanation

Studies seem to indicate that near the island of Crete, located in the Aegean Sea, there was an eruption of the Santorini volcano about 3,500 years ago. The volcanic ash is likely to have been washed into the Egypt region. There, when mixed with the electrical storms of the place, it could have become igneous hail, formed of ice and volcanic matter.

Meaning of the fiery hail plague

In this episode, the warning was not directed only to Pharaoh but to everyone who wanted to be saved. Hence, it represents the extension of Yahweh's mercy to the Gentiles (not Hebrews). It is not surprising that the symbol of punishment is the union of ice and fire, which symbolizes the union of opposites.

8. Plague of locusts

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Summary

Moses and Aaron announced to Pharaoh a plague of locusts that would destroy what the hail did not destroy. Pharaoh's servants begged him to yield, but the monarch did not. The next day, the locusts consumed all the vegetation in their path.

Pharaoh asked forgiveness for his sin and God dumped the locusts into the Red Sea. So the monarch offered Moses to let the men go alone, but this was inadmissible for them, and they could not leave.

The passage is narrated in the book of Exodus 10, 1-20.

Scientific explanation

Experts point out that the locust plague was a consequence of the Santorini volcano eruption. The expulsion of volcanic ash would have caused a series of climatic changes that favored the phenomenon. Such conditions would be specifically the excess of rain and a great concentration of humidity, all of which would favor the uncontrolled reproduction of these insects.

Meaning of the plague of locusts

The plague of locusts represents the final economic breakdown of the pharaoh and the division with his own people, since they asked him to let the Hebrews go. For this reason, it was only after this plague that Pharaoh recognized his faults and wanted to negotiate an alternative by letting the men go. But for the Hebrews, liberation would be for everyone, or it would not be.

9. Darkness

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Summary

God commanded Moses to extend his hand so that darkness would cover the Egyptian sky for three days. During that time, no one could be seen. Only the houses of the Hebrews had lighting.

Pharaoh allowed Moses to leave with their families, but without their livestock. But he refused. So Pharaoh did not let them out. Then he expelled Moses and threatened to kill him if he dared to return.

The passage is narrated in the book of Exodus 10, 20-29.

Scientific explanation

The phenomenon of darkness over Egypt has not yet had a definitive answer. The most accepted thesis maintains that it could have been a solar eclipse, since there is documentation on a phenomenon of this type that occurred around 1223 BC.

Meaning of the plague of darkness

Symbolically, the plague of darkness represents the blindness of Pharaoh (and, by extension, of the sinner), who refuses to recognize the voice of God. Let us also remember that the Egyptians worshiped the Sun god, so that darkness also symbolizes the fall of the last Egyptian idol, from the biblical perspective.

10. Death of the firstborn of Egypt

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Summary

The Lord warned Moses that he would put the firstborn of Egypt to death. To protect themselves from the passage of death, the Hebrews had to mark the lintel of their door with the blood of a lamb sacrificed in honor of Yahweh. That night the Hebrews would celebrate the first Passover, that is, the passing of the Lord.

Death passed through the houses of Egypt and also claimed the life of Pharaoh's firstborn. In desperation, he drove out the Hebrews with all their possessions. They immediately marched into the desert, not without first receiving gold and silver objects from the Egyptians as God had predicted.

The passage is narrated in the book of Exodus 11, 1-10; Exodus 12, 29-36.

Scientific explanation

There are two hypotheses to explain the death of the firstborn. Both link the scientific with the social and labor organization of Ancient Egypt.

The first explanation holds that the excess red algae in the Nile released large concentrations of lethal mycotoxins. The wheat fields would have absorbed the water contaminated with the mycotoxins. However, the firstborn were often the first to gather the grain of the crops, so they were more likely to be poisoned.

The second explanation proposes the possibility that there was a replica of the volcanic eruption. This would have raised a cloud of carbon dioxide from the ground, which can cause death. As the firstborn had the privilege of sleeping on the ground floor, they would have been the first to inhale the deadly gas.

Meaning of the death of the firstborn

In ancient times, the first-born son was the most valued for being the successor of the family line. Therefore, this passage represents the breaking point of the Pharaoh, unable to measure the consequences of his actions. Pharaoh himself would have written his fate in killing the firstborn Hebrews, never having given them the chance of salvation.

The passage is also part of the symbolism of sacrificial rituals. For Christians, a foreshadowing of the death of Christ can be seen: just as liberation would come to the Hebrews through the death of Pharaoh's firstborn, salvation would come to the world through the sacrifice of Jesus.

Background and context of the plagues of Egypt

According to the book of Exodus, the Hebrews lived in Egypt since the time of the patriarch Jacob and his son, Joseph. But at the death of both, Pharaoh made them slaves for fear of their prosperity and large numbers, and ordered the murder of newborn males. Moses was rescued by Pharaoh's daughter, who raised him as her own.

As an adult, Moses saw how an Egyptian mistreated a slave and murdered him. Discovered, he fled to Midian, took a wife and became a shepherd of flocks. During that period, God commissioned him to free the people and lead them to the promised land, with the help of his brother, Aaron.

The brothers met repeatedly with Pharaoh to communicate the divine message, but he did not want to listen. Moses and Aaron warned him that, if he persisted in his refusal, Yahweh would send various plagues on Egypt to persuade him. Only after the tenth (the death of the firstborn) did Pharaoh agree.

After these events, the Hebrews celebrated the first Passover, left Egypt and began their pilgrimage through the desert in search of the Promised Land.

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