My ideas have undergone a process of emergence by emergency. When they are needed badly enough, they are accepted.

Our little Spaceship Earth is only eight thousand miles in diameter, which is almost a negligible dimension in the great vastness of space.... Spaceship Earth was so extraordinarily well invented and designed that to our knowledge humans have been on board it for two million years not even knowing that they were on board a ship.

A fool with a tool still remains a fool.

All children are born geniuses, and we spend the first six years of their lives degeniusing them.

I say that radiation is inherently disintegrative: it comes apart. Gravity is inherently integrative: it pulls together. And to me, there's a good possibility that love is what I'd call metaphysical gravity. It really holds everything together.

Every time man makes a new experiment he always learns more. He cannot learn less. He may learn that what he thought was true was not true. By the elimination of a false premise, his basic capital wealth which in his given lifetime is disembarrassed of further preoccupation with considerations of how to employ a worthless time-consuming hypothesis. Freeing his time for its more effective exploratory investment is to give man increased wealth.

You can never learn less; you can only learn more. The reason I know so much is because I have made so many mistakes.