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Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.

No man can purchase his virtue too dear, for it is the only thing whose value must ever increase with the price it has cost us. Our integrity is never worth so much as when we have parted with our all to keep it.

Though ambition in itself is a vice, it often is also the parent of virtue.

A man's indebtedness is not virtue; his repayment is. Virtue begins when he dedicates himself actively to the job of gratitude.

To be ambitious of true honor, of the true glory and perfection of our natures, is the very principle and incentive of virtue.

Virtue can only flourish among equals.

Just as treasures are uncovered from the earth, so virtue appears from good deeds, and wisdom appears from a pure and peaceful mind. To walk safely through the maze of human life, one needs the light of wisdom and the guidance of virtue.

Virtue is its own reward. We only invented concepts like heaven and hell to describe how we feel. We don't feel good doing bad and it's nice to help someone.

Virtue is harmony.

The name and pretense of virtue is as serviceable to self-interest as are real vices.