When marrying, ask yourself this question: Do you believe that you will be able to converse well with this person into your old age? Everything else in marriage is transitory.
He who is usually self-sufficient becomes exceptionally vain and keenly alive to fame and praise when he is physically ill. The more he loses himself the more he has to endeavor to regain his position by means of the opinion of others.
In all institutions from which the cold wind of open criticism is excluded, an innocent corruption begins to grow like a mushroom - for example, in senates and learned societies
Science ... has no consideration for ultimate purposes, any more than Nature has, but just as the latter occasionally achieves things of the greatest suitableness without intending to do so, so also true science, as the imitator of nature in ideas, will occasionally and in many ways further the usefulness and welfare of man,-but also without intending to do so.
Kindliness, friendliness, the courtesy of the heart, are ever-flowing streams of non egoistic impulses, and have given far more powerful assistance to culture than even those much more famous demonstrations which are called pity, mercy, and self-sacrifice.
So far there has been no philosopher in whose hands philosophy has not grown into an apology for knowledge; on this point, at least, every one is an optimist, that the greatest usefulness must be ascribed to knowledge. They are all tyrannized over by logic, and this is optimism in its essence.
There is a universal need to exercise some kind of power, or to create for one's self the appearance of some power, if only temporarily, in the form of intoxication.