The most painful state of being is remembering the future, particularly the one you'll never have.

You love the accidental. A smile from a pretty girl in an interesting situation, a stolen glance, that is what you are hunting for, that is a motif for your aimless fantasy. You who always pride yourself on being an observateur must, in return, put up with becoming an object of observation. Ah, you are a strange fellow, one moment a child, the next an old man; one moment you are thinking most earnestly about the most important scholarly problems, how you will devote your life to them, and the next you are a lovesick fool. But you are a long way from marriage.

What if everything in the world were a misunderstanding, what if laughter were really tears?

This, then, is the ultimate paradox of thought: to want to discover something that thought itself cannot think.

The resolving of the ethical, is freedom; the negative resolution also has this, but the freedom, blank and bare, is as if tongue-tied, hard to express, and generally has something hard in its nature. Falling in love, however, promptly sets it to music, even if this composition contains a very difficult passage.

Do not interrupt the flight of your soul; do not distress what is best in you; do not enfeeble your spirit with half wishes and half thoughts. Ask yourself and keep on asking until you find the answer, for one may have known something many times, acknowledged it; one may have willed something many times, attempted it - and yet, only the deep inner motion, only the heart's indescribable emotion, only that will convince you that what you have acknowledged belongs to you, that no power can take it from you - for only the truth that builds up is truth for you.

And if something should be found, particularly in the first part of the dissertation, that one is generally not accustomed to come across in scholarly writings, the reader must forgive my jocundity, just as I, in order to lighten the burden, sometimes sing at my work.