The finest virtues can become deformed with age. The precise mind becomes finicky; the thrifty man, miserly; the cautious man, timorous; the man of imagination, fanciful. Even perseverance ends up in a sort of stupidity. Just as, on the other hand, being too willing to understand too many opinions, too diverse ways of seeing, constancy is lost and the mind goes astray in a restless fickleness. Reflections on Literature and Morality

Faith is not in power but in truth. The Brothers Karamazov 

Heaven knows we need never be ashamed of our tears, for they are rain upon the blinding dust of earth. Great Expectations

More and more it seems to me that the philosopher, being of necessity a man of tomorrow and the day after tomorrow, has always found himself, and had to find himself, in contradiction to his today: his enemy was ever the ideal of today. So far all these extraordinary furtherers of men whom one calls philosophers, though they themselves have rarely felt like friends of wisdom but rather like disagreeable fools and dangerous question marks, have found their task, their hard, unwanted, inescapable task, but eventually also the greatness of their task, in being the bad conscience of their time. Beyond Good and Evil