If you ask a theologian the question which forms the subject of this book: who is Satan? he will doubtless answer: Satan is the Commander-in-chief of the fallen angels. A Commander-in-chief implies an army, a hierarchy, a body of troops. What do we mean by angels? Are angels people like human beings, with a body and soul, or have they a more ethereal constitution than ours? Are they pure spirits, that is, without a body? In that case, what is meant by "fallen" in the theologians' definition of Satan? First of all, however, we must ask ourselves if here we are really concerned with authentic...