We still do not know one thousandth of one percent of what nature has revealed to us.

How terribly downright must be the utterances of storms and earthquakes to those accustomed to the soft hypocrisies of society.

There’s nothing you can know that isn’t known.

I’d like to think I’m a great teacher.

We are always paid for our suspicion by finding what we suspect.

Nature is ever at work building and pulling down, creating and destroying, keeping everything whirling and flowing, allowing no rest but in rhythmical motion, chasing everything in endless song out of one beautiful form into another.

In all private quarrels the duller nature is triumphant by reason of dullness.

No man can taste the fruits of autumn while he is delighting his scent with the flowers of spring.

I’m someone who likes plowing new ground, then walking away from it. I get bored easily. For me, the big thrill comes with the discovering.

What is a weed? A plant whose virtues have never been discovered.

I’m never going to go to Mars, but I’ve helped inspire, thank goodness, the people who built the rockets and sent our photographic equipment off to Mars.

Over the last 15 months, we’ve traveled to every corner of the United States. I’ve now been in 57 states? I think one left to go.

There are in fact two things, science and opinion; the former begets knowledge, the latter ignorance.

What I’m trying to do is, is to make a significant difference in space flight. And help make space flight accessible to almost anyone.

When you draw or paint a tree, you do not imitate the tree; you do not copy it exactly as it is, which would be mere photography. To be free to paint a tree or a flower or a sunset, you have to feel what it conveys to you: the significance, the meaning of it.

We have no right to express an opinion until we know all of the answers.

A man will turn over half a library to make one book.

The unnatural, that too is natural.

I want parents to teach that academic intelligence is essential, but so is financial intelligence.

I know that I am intelligent, because I know that I know nothing.

Education is simply the soul of a society as it passes from one generation to another.

Nature will bear the closest inspection. She invites us to lay our eye level with her smallest leaf, and take an insect view of its plain.

You carry Mother Earth within you. She is not outside of you. Mother Earth is not just your environment.

When you look at the sun during your walking meditation, the mindfulness of the body helps you to see that the sun is in you; without the sun there is no life at all and suddenly you get in touch with the sun in a different way.

Much learning does not teach understanding.

No matter how much cats fight, there always seem to be plenty of kittens.

Between the ages of fifteen and twenty-four, I must have read a whole library.

If a man writes a book, let him set down only what he knows. I have guesses enough of my own.

The first and simplest emotion which we discover in the human mind, is curiosity.

Disease is the retribution of outraged Nature.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

The progress of rivers to the ocean is not so rapid as that of man to error.

I love to travel, but hate to arrive.

Philosophically considered, the universe is composed of Nature and the Soul. Strictly speaking, therefore, all that is separate from us, all which Philosophy distinguishes as the ‚Not Me,‘ that is, both nature and art, all other men and my own body, must be ranked under this name, ‚Nature.‘

There are things known and there are things unknown, and in between are the doors of perception.

The undiscovered country from whose bourn no traveler returns.

There are two great forces, God’s force of good and the devil’s force of evil, and I believe Satan is alive and he is working, and he is working harder than ever, and we have many mysteries that we don’t understand.

Knowledge is true opinion.

One of the things you’re doing when you make art, apart from entertaining yourself and other people, is trying to see what ways of working feel good, what feels right.

We know the truth, not only by the reason, but also by the heart.

O wise man! Give your wealth only to the worthy and never to others. The water of the sea received by the clouds is always sweet.

More people should read books. It’s the most concentrated experience you can have.

There are only two kinds of people who are really fascinating – people who know absolutely everything, and people who know absolutely nothing.

He who knows, does not speak. He who speaks, does not know.

Seeing much, suffering much, and studying much, are the three pillars of learning.

Loss is nothing else but change, and change is Nature’s delight.

I’ve been here before and will come again, but I’m not going this trip through.

For novelists or musicians, if they really want to create something, they need to go downstairs and find a passage to get into the second basement. What I want to do is go down there, but still stay sane.

Facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty.

I think one of my pursuits over the years is trying to answer the question of, ‚What else can you do with a voice other than stand in front of a microphone and sing?‘

The endeavor to understand is the first and only basis of virtue.

Wisdom oft times consists of knowing what to do next.

Light is the greatest disinfectant in nature and also in organizations.

Education is important because it prepares you for life.

I say there is no darkness but ignorance.

When we try to pick out anything by itself, we find it hitched to everything else in the universe.

Music is the one incorporeal entrance into the higher world of knowledge which comprehends mankind but which mankind cannot comprehend.

I am a generous man, by nature, and far more trusting than I should be. Indeed. The real world is risky territory for people with generosity of spirit. Beware.

Study hard so that you can master technology, which allows us to master nature.

I doubt anyone else would have travelled as extensively as I have to meet the citizens of the country.

The human animal originally came from out-of-doors. When spring begins to move in his bones, he just must get out again. Moreover, as civilization, cement pavements, office buildings, radios have overwhelmed us, the need for regeneration has increased, and the impulses are even stronger.