One is wise to cultivate the tree that bears fruit in our soul.

I think that no experience which I have today comes up to, or is comparable with, the experiences of my boyhood.

There is nothing more difficult to find than oneself.

The fact which interests us most is the life of the naturalist. The purest science is still biographical. Nothing will dignify and elevate science while it is sundered so wholly from the moral life of its devotee.

When a dog runs at you, whistle for him.

Let your life be a counter-friction to stop the machine. What I have to do is to see, at any rate, that I do not lend myself to the wrong which I condemn.

If we cannot sing of faith and triumph, we will sing our despair. We will be that kind of bird. There are day owls, and there arenight owls, and each is beautiful and even musical while about its business.