Morals today are corrupted by our worship of riches.

Sound conviction should influence us rather than public opinion.

Since an intelligence common to us all makes things known to us and formulates them in our minds, honorable actions are ascribed by us to virtue, and dishonorable actions to vice; and only a madman would conclude that these judgments are matters of opinion, and not fixed by nature.

There is no statement so absurd that no philosopher will make it.

Old age: the crown of life, our play's last act.

It is not by muscle, speed, or physical dexterity that great things are achieved, but by reflection, force of character, and judgment.

Not only is there an art in knowing a thing, but also a certain art in teaching it.