Benjamin

To be happy is to be able to become aware of oneself without fright.

Wittgenstein

I don’t know why we are here, but I’m pretty sure that it is not in order to enjoy ourselves.

Camus

You will never be happy if you continue to search for what happiness consists of. You will never live if you are looking for the meaning of life.

Kierkegaard

Life must be understood backwards; but… it must be lived forward.

Karl von Clausewitz

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Aeschylus

He who learns must suffer. And even in our sleep pain that cannot forget falls drop by drop upon the heart, and in our own despair, against our will, comes wisdom to us by the awful grace of God.

Greta Garbo

A man can be himself only so long as he is alone.

Schopenhauer

The Raven

Once upon a midnight dreary, while I pondered weak and weary,
Over many a quaint and curious volume of forgotten lore,
While I nodded, nearly napping, suddenly there came a tapping,
As of some one gently rapping, rapping at my chamber door.
`’Tis some visitor,’ I muttered, `tapping at my chamber door -
Only this, and nothing more.’

You can read the rest and generally Poe yourself to death here.