The small wisdom is like water in a glass: clear, transparent, pure. The great wisdom is like the water in the sea: dark, mysterious, impenetrable.

Realize that everything connects to everything else.

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.

When people tell me they've learned from experience, I tell them the trick is to learn from other people's experience.

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.