Nature is the best teacher; it has already done the experiments, we just have to interpret them.

The highest form of theory is the ability to simplify complex things into simple and clear principles.

The white race believes—believes with all its heart—that it is their right to take the land.

"The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion."

"Biography is the closest we come to time travel."

A people without children would face a hopeless future; a country without trees would face a future with even less hope.