Where is there dignity unless there is honesty?

Philosophy is the true mother of science.

Never can custom conquer nature, for she is ever unconquered.

The evil implanted in man by nature spreads so imperceptibly, when the habit of wrong-doing is unchecked, that he himself can set no limit to his shamelessness.

No man can be brave who thinks pain the greatest evil; nor temperate, who considers pleasure the highest good.

He who has once deviated from the truth, usually commits perjury with as little scruple as he would tell a lie.

He does not seem to me to be a free man who does not sometimes do nothing.