"If your mind is not polluted by these things, you will always be healthy."

"Do not be concerned with what people think of you. You are not living for them."

"Other people's views and troubles can be contagious. Don't sabotage yourself by unwittingly adopting negative, unproductive attitudes through your associations with others."

"If you are struck by the appearance of any pleasure, guard yourself against being carried away by it; but let the thing wait for you, and allow yourself a short delay. Then think of two times: a time …"

"If a man has a bad smell, he is not to blame for it, but his clothes. If a man is ill, he is not to blame for it, but his body. If a man is a fool, he is not to blame for it, but his mind."