Henry B. Adams said:

No man likes to have his intelligence or good faith questioned, especially if he has doubts about it himself.

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.

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

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

Accident counts for as much in companionship as in marriage.

Accident counts for much in companionship as in marriage.

All experience is an arch, to build upon.

American society is a sort of flat, fresh-water pond which absorbs silently, without reaction, anything which is thrown into it.

As for America, it is the ideal fruit of all your youthful hopes and reforms. Everybody is fairly decent, respectable, domestic, bourgeois, middle-class, and tiresome. There is absolutely nothing to revile except that it's a bore.