I have, I believe, the ...

I have, I believe, the courage to doubt everything; I have, I believe, the courage to fight against everything; but I do not have the courage to acknowledge anything, the courage to possess, to own anything.
I have, I believe, the courage to doubt everything; I have, I believe, the courage to fight against everything; but I do not have the courage to acknowledge anything, the courage to possess, to own anything.

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

Learning to know anxiety is an adventure which every man has to affront if he would not go to perdition either by not having known anxiety or by sinking under it. He therefore who has leaned rightly to be in anxiety has learned the most important thing.
Not just in commerce but in the world of ideas too our age is putting on a veritable clearance sale. Everything can be had so dirt cheap that one begins to wonder whether in the end anyone will want to make a bid.
It is a very curious thing about superstition. One would expect that the man who had once seen his morbid dreams were not fulfilled would abandon them for the future; but on the contrary they grow even stronger just as the love of gambling increases in a man who has once lost in a lottery.
The gods were bored and so they created man. Adam was bored because he was alone, so Eve was created. Thus boredom entered the world, and increased in proportion to the increase in population. Adam was bored alone, then Adam and Eve were bored together; them Adam and Eve and Cain and Abel were bored en famille; then the population of the world increased, and the people were bored en masse.
Christianity does not oppose debauchery and uncontrollable passions and the like as much as it opposes... flat mediocrity, this nauseating atmosphere, this homey, civil togetherness, where admittedly great crimes, wild excesses, and powerful aberrations cannot easily occur - but where God's unconditional demand has even greater difficulty in accomplishing what it requires: the majestic obedience of submission.