“I think I could stand anything, any suffering, only to be able to say and to repeat to myself every moment, 'I exist.' In thousands of agonies -- I exist. I'm tormented on the rack -- but I exist! Though I sit alone in a pillar -- I exist! I see the sun, and if I don't see the sun, I know it's there. And there's a whole life in that, in knowing that the sun is there.”

“I can see the sun, but even if I cannot see the sun, I know that it exists. And to know that the sun is there - that is living.”

“I used to imagine adventures for myself, I invented a life, so that I could at least exist somehow.”

“God is necessary, and therefore must exist... But I know that he does not and cannot exist... Don't you understand that a man with these two thoughts cannot go on living?”

“I don't know how it is with others, and my feeling is that I cannot be like any other. Any other thinks, and then at once thinks something else. I cannot think something else, I think one thing all my life. God has tormented me all my life.”

“Do you know I've been sitting here thinking to myself: that if I didn't believe in life, if I lost faith in the woman I love, lost faith in the order of things, were convinced in fact that everything is a disorderly, damnable, and perhaps devil-ridden chaos, if I were struck by every horror of man's disillusionment -- still I should want to live. Having once tasted of the cup, I would not turn away from it till I had drained it! At thirty though, I shall be sure to leave the cup even if I've not emptied it, and turn away -- where I don't know. But till I am thirty I know that my youth will triumph over everything -- every disillusionment, every disgust with life. I've asked myself many times whether there is in the world any despair that could overcome this frantic thirst for life. And I've come to the conclusion that there isn't, that is until I am thirty.”

“I don't need you to tell me I'm not well, though I don't really know what's wrong with me; I think I'm five times healthier than you are.”