Whatever does not kill me makes me stronger.

The hour when you say, "What does my happiness matter? It is poverty and filth, and a wretched complacency. Yet my happiness should justify existence itself!

When our brain feels too weak to deal with our opponent's objections, our heart answers by casting suspicion on their underlying motives.

He who bestows something great receives no gratitude; for in accepting it the recipient has already been weighed down too much.

Love is a state in which a man sees things most decidedly as they are not.

Everything that is ponderous, vicious and pompously clumsy, all long-winded and wearying kinds of style, are developed in great variety among Germans.

The finest and healthiest thing about science is, as in the mountains, the brisk air blowing around in it.--The spiritually delicate (such as artists) shun and slander science owing to this air.