You can hardly convince a man of an error in a lifetime, but must content yourself with the reflection that the progress of science is slow. If he is not convinced, his grandchildren may be.

Every sunset I witness inspires me with the desire to go to West as distant and as fair as that which the sun goes down. Eastward I go only by force; but westward I go free.

I saw a muskrat come out of a hole in the ice ... While I am looking at him, I am thinking what he is thinking of me. He is a different sort of man, that's all.

The intellect is a cleaver; it discerns and rifts its way into the secrets of things.

To have done anything just for money is to have been truly idle.

How can we expect a harvest of thought who have not had a seedtime of character?

In the planting of the seeds of most trees, the best gardeners do no more than follow Nature, though they may not know it.