“Nearly every person who develops an idea works at it up to the point where it looks impossible, and then gets discouraged. That’s not the place to become discouraged.”

What you are will show in what you do.

Fools call wise men fools. A wise man never calls any man a fool.

Nature is truly wonderful. Only man is truly foul.

When I have eliminated the ways that will not work, I will find the way that will work.

A diamond is a piece of coal that stuck to the job.

When you have exhausted all possibilities, remember this – you haven’t.

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.

Non-violence leads to the highest ethics, which is the goal of all evolution. Until we stop harming all other living beings, we are still savages.

To get a great idea, come up with lots of them.

A genius is a talented person who does his homework.

Consider data without prejudice.

I am proud of the fact that I never invented weapons to kill.

A man’s best friend is a good wife.

I failed my way to success.

Many of life’s failures are people who did not realize how close they were to success when they gave up.

The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.

We are part of the process; we are the exquisite result of billions of years of natural research and development.

God’s priority isn’t your destination but your development. God’s priority isn’t the dream but the dreamer.

I’ll admit that the discovery of evolution is humbling, but it is also empowering. It transforms our relationship to the life around us. Instead of being outsiders watching the natural world go by, we are insiders.

A belief that no commercial activities must be allowed inside the park, but permitting unrestrained development outside, even though the landscape there may be just as outstanding.

I dream …of a world where we can commit our social resources to the development of human life and not to its destruction

Thoroughly understand what it is to understand, and not only will you understand the broad lines of all there is to be understood but also you will possess a fixed base, an invariant pattern, opening upon all further developments of understanding.

Choice is a determinant in personal development … by my free acts I am making myself.

One time I completely thought I’d turned into a werewolf and was sure I could see hairs sprouting from my face. At those times I’d suddenly go very quiet and not talk to anyone, stunned from the developments, being a werewolf and all.