If morals deteriorate, taste will inevitably deteriorate.

——Diderot

To have knowledge without morality is like a villain; to have morality without knowledge is like a coward.

——Roosevelt

If people call exaggeration and violence virtues, and call moderation and justice crimes, then such a country is not far from destruction.

——Napoleon

The greatest harm of bad habits is to devalue a person's value.

——Gide

Bad habits gradually form unconsciously.

——Dryden

Inhumane reason will inevitably lead to the complete loss of humanity.

——Anixter