“In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.”

“If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.”

“Real life is about accepting ups and downs, the good and the bad, the possibility of failure as well as the ambition to succeed. Atheism speaks to the truth about our human nature because it recognizes all this and does not seek to shield us from the truth by myth and superstition”

“In order that all men may be taught to speak truth, it is necessary that all likewise should learn to hear it.”

“Because there is happiness only where there is coordination with the Truth, the Reality, the Act that underlies and directs all things to their essential and accidental perfections: and that is the will of God. There is only one happiness: to please Him. Only one sorrow, to be displeasing to Him, to refuse Him something, to turn away from Him, even in the slightest thing, even in thought, in a half-willed movement of appetite: in these things and these alone, is sorrow, in so far as they imply separation, or the beginning, the possibility of separation from Him Who is our life and all our joy. And since God is a Spirit, and infinitely above all matter and all creation, the only complete union possible, between ourselves and Him, is in the order of intention: a union of wills and intellects, in love, charity.”

“It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them.”