“Sitting calmly on a ship in fair weather is not a metaphor for having faith; but when the ship has sprung a leak, then enthusiastically to keep the ship afloat by pumping and not to seek the harbor--that is the metaphor for having faith. (Concluding Unscientific Postscript)”

“My melancholy is the most faithful sweetheart I have had.”

“to have faith is precisely to lose one's mind so as to win God.”

“If anyone thinks he has faith and yet is indifferent towards this possession, is neither cold nor hot, he can be certain that he does not have faith. If anyone thinks he is Christian and yet is indifferent towards his being a Christian, then he really is not one at all. What would we think of a man who affirmed that he was in love and also that it was a matter of indifference to him?”

“Faith is a marvel, and yet no human being is excluded from it; for that in which all human life is united is passion, and faith is a passion.”

“For he who loves God without faith reflects on himself, while the person who loves God in faith reflects on God.”

“Faith is the highest passion in a man.”