The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
The fencer's weapon is picked up and put down again. The boxer's is part of him. All he has to do is clench his fist.
Remember this very little is needed to make a happy life.
The body and its parts are a river, the soul a dream and mist, life is warfare and a journey far from home, lasting reputation is oblivion.
I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinions of himself than on the opinions of others.
You have sent a letter to me through the hand of a "friend" of yours, as you call him. And in your very next sentence you warn me not to discuss with him all the matters that concern you, saying that even you yourself are not accustomed to do this; in other words, you have in the same letter affirmed and denied that he is your friend.