The greatest inventors are unknown to us. Someone invented the wheel - but who?

There is no merit to discipline under ideal circumstances. I must have it in the face of death or it is worthless.

The Earth faces environmental problems right now that threaten the imminent destruction of civilization and the end of the planet as a livable world. Humanity cannot afford to waste its financial and emotional resources on endless, meaningless quarrels between each group and all others. there must be a sense of globalism in which the world unites to solve the real problems that face all groups alike.

True literacy is becoming an arcane art, and the nation is steadily "dumbing down."

The fundamentalists deny that evolution has taken place; they deny that the earth and the universe as a whole are more than a few thousand years old, and so on. There is ample scientific evidence that the fundamentalists are wrong in these matters, and that their notions of cosmogony have about as much basis in fact as the Tooth Fairy has.

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

I received the fundamentals of my education in school, but that was not enough. My real education, the superstructure, the details, the true architecture, I got out of the public library.