There is in fact a true law namely right reason, which is in accordance with nature, applies to all men and is unchangeable and eternal. ... It will not lay down one rule at Rome and another at Athens, nor will it be one rule today and another tomorrow. But there will be one law eternal and unchangeable binding all times and upon all peoples.

Virtue and decency are so nearly related that it is difficult to separate them from each other but in our imagination.

Ability without honor is useless.

There is in superstition a senseless fear of God.

There is sufficient reward in the mere consciousness of a good action.

Anger should never appear in awarding punishment.

True law is right reason in agreement with nature;...it summons to duty by its commands, and averts from wrongdoing by its prohibitions... It is a sin to try to alter this law, nor is it allowable to attempt to repeal any part of it, and it is impossible to abolish it entirely.