What Can You Learn From Egypt's Vengeance?

"And behold I am strengthening the heart of Egypt, and they shall come after them."  (Shemos 14:17)
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“In the way that a man wishes to go, he is led (by Hashem)” (Makos 10B). The leaders of Egypt, although they had been forced by the Plagues to send Israel free, were still desirous of revenge and perhaps of recapturing Israel. Therefore Hashem led them on to become the means of achieving in the world a greater Awareness of Hashem. The wish of the Egyptians led to their destruction. — A Nation is Born