An American Virgin would never dare command; an American Venus would never dare exist.

It is now conceded that all idea of British intervention is at an end... I want to hug the army of the Potomac. I want to get the whole army of Vicksburg drunk at my own expense. I want to fight some small man and lick him.

Some day science may have the existence of mankind in its power, and the human race commit suicide, by blowing up the world.

[P]olitical and social and scientific values ... should be correlated in some relation of movement that could be expressed in mathematics, nor did one care in the least that all the world said it could not be done, or that one knew not enough mathematics even to figure a formula beyond the schoolboy s=(1/2)gt2. If Kepler and Newton could take liberties with the sun and moon, an obscure person ... could take liberties with Congress, and venture to multiply its attraction into the square of its time. He had only to find a value, even infinitesimal, for its attraction.

There is no such thing as an underestimate of average intelligence.

Good men do the most harm.

At the utmost, the active-minded young man should ask of his teacher only mastery of his tools. The young man himself, the subject of education, is a certain form of energy; the object to be gained is economy of his force; the training is partly the clearing away of obstacles, partly the direct application of effort. Once acquired, the tools and models may be thrown away.