Ephesians 2:2

In time past ye walked according to the course of this world. You lived in trespasses and sins, in accordance with the spirit of the world.

The prince of the power of the air. Called elsewhere "the prince of this world" (Joh 12:31 14:30 16:11), Satan. Why he is called "prince of the power of the air" is not certain; various explanations are given. Probably his subtle influences and whisperings pervade the air, and come upon us as unconsciously as the vital fluid we breathe. The Jews held that the atmosphere was the abode of evil angels.

The spirit that now worketh in the children of disobedience. This spirit, that of the world, of the power of the air, is the one which inspires those who live in disobedience.
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