The most alarming of all man's assaults upon the environment is the contamination of air, earth, rivers, and sea with dangerous and even lethal materials.

But man is a part of nature, and his war against nature is inevitably a war against himself.

One way to open your eyes is to ask yourself, "What if I had never seen this before? What if I knew i would never see it again?

Conservation is a cause that has no end. There is no point at which we will say our work is finished.

Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts.

The human race is challenged more than ever before to demonstrate our mastery, not over nature but of ourselves.

Science is part of the reality of living; it is the what, the how, and the why of everything in our experience.

We cannot have peace among men whose hearts find delight in killing any living creature.

Knowing what I do, there would be no future peace for me if I kept silent.

The more clearly we can focus our attention on the wonders and realities of the universe about us, the less taste we shall have for destruction.

Drink in the beauty and wonder at the meaning of what you see.

There is no 'the truth, ' 'a truth'--truth is not one thing, or even a system. It is an increasing complexity.

Nothing is as endearing as a handwritten letter scribed by the person who holds your heart spellbound.

I'm not retiring. I am graduating. Today is my graduation day. Retirement means that you'll just go ahead and live on your laurels and surf all day in Oceanside. It ain't going to happen.

There's no hope. There's no reason to keep trying. Because you must. This is not hope. Not reason. This is your fate. This is your life, what you must do.

I just like doing a lot of different things. People need a reason to get their butts out of bed and do something.

Wealth brings strength, strength confidence.

Our soulmate is the one who makes life come to life.

I'm not the go-to guy. Everybody is trying to tell their story and have different ways of telling it.

Mouse was the truest friend I ever had. And if there is such a thing as true evil, he was that too.

That mighty orb of song, The divine Milton.