“God is dead, but considering the state the species man is in, there will perhaps be caves, for ages yet, in which his shadow will be shown.”

“New struggles. -- After Buddha was dead, they still showed his shadow in a cave for centuries -- a colossal, horrible shadow. God is dead, but given the way people are, there may still be caves for millennia in which his shadow is displayed. -- And we -- we must still defeat his shadow as well!”

“There are sacraments of evil as well as of good about us, and we live and move to my belief in an unknown world, a place where there are caves and shadows and dwellers in twilight. It is possible that man may sometimes return on the track of evolution, and it is my belief that an awful lore is not yet dead.”

“There is a strange duality in the human which makes for an ethical paradox. We have definitions of good qualities and of bad; not changing things, but generally considered good and bad throughout the ages and throughout the species. Of the good, we think always of wisdom, tolerance, kindliness, generosity, humility; and the qualities of cruelty, greed, self-interest, graspingness, and rapacity are universally considered undesirable. And yet in our structure of society, the so-called and considered good qualities are invariable concomitants of failure, while the bad ones are the cornerstones of success…Perhaps no other animal is so torn between alternatives. Man might be described fairly adequately, if simply, as a two-legged paradox.”

“The age of the skyscraper is gone. This is the age of the housing project. Which is always a prelude to the age of the cave.”

“God did not, as the Bible says, make man in His image; on the contrary man, as I have shown in The Essence of Christianity, made God in his image.”