ضع نُصْبَ عينيك، في كل حين، الموتَ والمنفى وكلَّ ما يبدو مرعبًا، ولكن اجعل الموتَ أوَّلَها جميعًا. عندئذٍ لن تفكِّر أبدًا في أي شيءٍ دنيء، ولن تتوق إلى أيِّ شيءٍ تَوْقًا زا… - Epictetus

The condition and characteristic of an uninstructed person is this: he never expects from himself profit (advantage) nor harm, but from externals. The condition and characteristic of a philosopher is this: he expects all advantage and all harm from himself.

Nature hath given men one tongue but two ears, that we may
hear from others twice as much as we speak.

In short, if we observe, we shall find that the animal man is pained by nothing so much as by that which is irrational; and, on the contrary, attracted to nothing so much as to that which is rational.