It's humbling to think that all animals, including human beings, are parasites of the plant world.

The greatest weapons in the conquest of knowledge are an understanding mind and the inexorable curiosity that drives it on.

[O]ur statesmen, our businessmen, our everyman must take on a science fictional way of thinking.

Experimentation is the least arrogant method of gaining knowledge. The experimenter humbly asks a question of nature.

[A]ll knowledge is one. When a light brightens and illuminates a corner of a room, it adds to the general illumination of the entire room. Over and over again, scientific discoveries have provided answers to problems that had no apparent connection with the phenomena that gave rise to the discovery.

It's the writing that teaches you.

Self-education is, I firmly believe, the only kind of education there is.