Everything should be made as simple as possible, but not simpler.

Not everything that counts can be counted, and not everything that can be counted counts.

True wisdom comes to each of us when we realize how little we understand about life, ourselves, and the world around us.

There's a dark side to everything.

Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.

Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.