“If you can’t explain it simply, you don’t understand it well enough.”

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

If you can't feed a hundred people, then just feed one.

I don't believe in playing down to children, either in life or in motion pictures. I didn't treat my own youngsters like fragile flowers, and I think no parent should.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

You may be disappointed if you fail, but you are doomed if you don't try.

It is our failure to become our perceived ideal that ultimately defines us and makes us unique.