What is morally wrong can never be advantageous, even when it enables you to make some gain that you believe to be to your advantage. The mere act of believing that some wrongful course of action constitutes an advantage is pernicious.

Every generous action loves the public view; yet no theatre for virtue is equal to a consciousness of it.

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

If you possess a library and a garden, you have everything you need. (translation from the French) Si vous possedez une bibliotheque et un jardin, vous avez tout ce qu'il vous faut.

He has no worse enemy than himself.

When you wish to instruct, be brief; that men's [children's] minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.

If wisdom be attainable, let us not only win but enjoy it.