The two powers which in my opinion constitute a wise man are those of bearing and forbearing.
Against specious appearances we must set clear convictions, bright and ready for use. When death appears as an evil, we ought immediately to remember that evils are things to be avoided, but death is inevitable.
Authentic happiness is always independent of external conditions.
The origin of sorrow is this: to wish for something that does not come to pass.
Make the best use of what is in your power, and take the rest as it happens.
Whenever you are angry, be assured that it is not only a present evil, but that you have increased a habit.