There can be no doubt that all our knowledge begins with experience.

Two things strike me dumb: the infinite starry heavens, and the sense of right and wrong in man.

Man must be disciplined, for he is by nature raw and wild.

It is not God's will merely that we should be happy, but that we should make ourselves happy

Every human being should always be treated as an end and never as a mere instrument.

In man (as the only rational creature on earth) those natural capacities which are directed to the use of his reason are to be fully developed only in the race, not in the individual.

We can never, even by the strictest examination, get completely behind the secret springs of action.