If I were confined to a corner of a garret all my days, like a spider, the world would be just as large to me while I had my thoughts about me.

The eye may see for the hand, but not for the mind.

I believe that it is in my power to elevate myself this very hour above the common level of my life.

All things in this world must be seen with youthful, hopeful eyes.

It is not part of a true culture to tame tigers, any more than it is to make sheep ferocious.

If you can't explain it to a six year old, you don't understand it yourself. Rather than love, than money, than fame, give me truth.

We can never have enough of nature. We must be refreshed by the sight of inexhaustible vigor, vast and titanic features, the sea-coast with its wrecks, the wilderness with its living and its decaying trees, the thunder-cloud, and the rain.