Whoso is content with pure experience and acts upon it has enough of truth.

Let mental culture go on advancing, let the natural sciences progress in even greater extent and depth, and the human mind widen itself as much as it desires: beyond the elevation and moral culture of Christianity, as it shines forth in the Gospels, it will not go.

Legislators and revolutionaries who promise both equality and liberty are visionaries and charlatans.

There is no permanence in doubt; it incites the mind to closer inquiry and experiment, from which, if rightly managed, certainty proceeds, and in this alone can man find thorough satisfaction.

It is in self-limitation that a master first shows himself.

It is said that no man is a hero to his valet. That is because a hero can be recognized only by a hero.

Let us live in as small a circle as we will, we are either debtors or creditors before we have had time to look around.