Every oak tree started out as a couple of nuts who stood their ground.

This life we live is a strange dream, and I don't believe at all any account men give of it.

Our poets have sung of wine, the product of a foreign plant which commonly they never saw, as if our own plants had no juice in them more than the singers.

Do not engage to find things as you think they are.

Yet, for my part, I was never unusually squeamish; I could sometimes eat a fried rat with a good relish, if it were necessary.

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.

Treat your friends for what you know them to be. Regard no surfaces. Consider not what they did, but what they intended.