The only excuse for war is that we may live in peace unharmed.

Let arms yield to the toga, let the [victor's] laurel yield to the [orator's] tongue.

What is so beneficial to the people as liberty, which we see not only to be greedily sought after by men, but also by beasts, and to be prepared in all things.

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.

Never injure a friend, even in jest.

Friendship embraces innumerable ends; turn where you will it is ever at your side; no barrier shuts it out; it is never untimely and never in the way.

Friendship was given by nature to be an assistant to virtue, not a companion in vice.