No man is happy who does not think himself so.

Your mind will be like its habitual thoughts; for the soul becomes dyed with the color of its thoughts. Soak it then in such trains of thoughts as, for example: Where life is possible at all, a right life is possible.

Alexander the Great and his mule driver both died and the same thing happened to both.

The happiness of your life depends upon the quality of your thoughts.

Put an end once and for all to this discussion of what a good person should be, and be one.

There is change in all things. You yourself are subject to continual change and some decay, and this is common to the entire universe.

Our anger and annoyance are more detrimental to us than the things themselves which anger or annoy us.