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The virtues of science are skepticism and independence of thought.

Virtue is harmony.

In order to know virtue, we must first acquaint ourselves with vice.

Virtue comes by nature, learning, and practice, and thanks to virtue, all of the aforesaid may deserve approval.

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.

Wisdom alone is the science of other sciences.

Virtue is a habit of the mind, consistent with nature and moderation and reason.

True virtue is life under the direction of reason.

Philosophy was once considered science.

Sciences may be learned by rote, but wisdom not.