The solutions all are simple / after you have arrived at them. But they're simple only when you know already what they are.

The solutions all are simple - after you have arrived at them. But they're simple only when you know already what they are.

Why, for example, should a group of simple, stable compounds of carbon, hydrogen, oxygen and nitrogen struggle for billions of years to organise themselves into a professor of chemistry? What's the motive?

The best solutions are often simple, yet unexpected.

One geometry cannot be more true than another; it can only be more convenient. Geometry is not true, it is advantageous.

Boredom always precedes a period of great creativity.