Every time man makes a new experiment he always learns more. He cannot learn less.

Never show unfinished work.

You can't learn less.

I'm not trying to copy Nature, I'm trying to find the principles she's using.

By the time you are 88 years old, you "have consumed 300 tons of food, air and water."

Technologically we now have four [seven!] billion billionaires on board Spaceship Earth who are entirely unaware of their good fortune.

The impossible happens.