The world rests on principles.

We must walk consciously only part way toward our goal, and then leap in the dark to our success. What we do best or most perfectly is what we have most thoroughly learned by the longest practice, and at length it falls from us without our notice, as a leaf from a tree.

Men go back to the mountains, as they go back to sailing ships at sea, because in the mountains and on the sea they must face up.

The imagination, give it the least license, dives deeper and soars higher than Nature goes.

I do not judge men by anything they can do. Their greatest deed is the impression they make on me.

Not until we are lost do we begin to understand ourselves.

There is an incessant influx of novelty into the world, and yet we tolerate incredible dullness.