There is no more sure tie between friends than when they are united in their objects and wishes.

Those wars are unjust which are undertaken without provocation. For only a war waged for revenge or defence can actually be just.

I speak of that learning which wakes us acquainted with the boundless extent of nature, and the universe, and which even while we remain in this world, discovers to us both heaven, earth, and sea.

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.

Of all nature's gifts to the human race, what is sweeter to a man than his children?

The man who is always fortunate cannot easily have a great reverence for virtue.

Anyone may fairly seek his own advantage, but no one has a right to do so at another's expense.