Henry Brooks Adams

A teacher affects eternity; he can never tell where his influence stops.

Power is poison. It's effect on Presidents had always been tragic.

Unintelligible answers to insoluble problems.

They know enough who know how to learn.

The woman who is known only through a man is known wrong.

The proper study of mankind is woman.

Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts.

One friend in a lifetime is much, two are many, three are hardly possible. Friendship needs a certain parallelism of life, a community of thought, a rivalry of aim.

A friend in power is a friend lost.

Absolute liberty is absence of restraint; responsibility is restraint; therefore, the ideally free individual is responsible to himself.