The natural world is the greatest source of excitement. The greatest source of visual beauty. It is the greatest source of so much in life that makes life worth living.

Courage is a kind of salvation.

As soon as you trust yourself, you will know how to live.

Maybe this world is another planet?s hell.

As far as we can discern, the sole purpose of human existence is to kindle a light of meaning in the darkness of mere being.

The love of life is necessary to the vigorous prosecution of any undertaking.

In three words I can sum up everything I've learned about life: it goes on.

The young people think the old people are fools - but the old people know the young people are fools.

Living is Easy with Eyes Closed.

That's the trouble with the world. We all despise ourselves.

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

Quick sensitivity is inseperable from a ready understanding.

Is it not enough that 'things are cruel and blind'? Must we also be cruel and blind?

The journey of a thousand miles begins with one step.

If we are not free, no one will respect us.

You can find the entire cosmos lurking in its least remarkable objects.

The time you enjoy wasting is not wasted time.

Sow a thought and you get an act; Sow an act and you get a habit; Sow a habit and you get a character; Sow a character and you get a destiny.

No passion in the world is equal to the passion to alter someone else's draft.

Life is an ongoing process of choosing between safety (out of fear and need for defense) and risk (for the sake of progress and growth). Make the growth choice a dozen times a day.

The earth is like a spaceship that didn't come with an operating manual.