A person of genius should marry a person of character.

It takes me several days, after I get back to Boston, to realize that the reference "the president" refers to the president of Harvard and not to a minor official in Washington.

To an imagination of any scope the most far reaching form of power is not money, it is the command of ideas

History has to be rewritten because history is the selection of those threads of causes or antecedents that we are interested in.

The difference between gossip and philosophy lies only in one's way of taking a fact.

Longevity is having a chronic disease - and taking care of it.

A mind that is stretched by a new experience can never go back to its old dimensions.