This work begins: "I know that there are many who call themselves Christians, and who believe in the Redemption, and yet, absurdly enough, deny the personal existence of Satan. They assert, with an air of profound wisdom, that the word devil, Satan, is simply the imaginary personification of all the evil influences to which we are subject in this life. But I ask: What can be more absurd than to deny what all nations, without exception, have always...