People exist for one another.

Since it is possible that thou mayest depart from life this very moment, regulate every act and thought accordingly. But to go away from among men, if there are gods, is not a thing to be afraid of, for the gods will not involve thee in evil; but if indeed they do not exist, or if they have no concern about human affairs, what is it to me to live in a universe devoid of gods or devoid of Providence? But Gods there are, undoubtedly, and they regard human affairs; and have put it wholly in our power, that we should not fall into what is truly evil.

As for literature, thefts cannot harm it, while the lapse of ages augments its value

Though thou be destined to live three thousand years and as many myriads besides, yet remember that no man loseth other life than that which he liveth, nor liveth other than that which he loseth.

Always run to the short way; and the short way is the natural: accordingly say and do everything in conformity with the soundest reason. For such a purpose frees a man from trouble, and warfare, and all artifice and ostentatious display.

To live happily is an inward power of the soul.

The things you think about determine the quality of your mind. Your soul takes on the color of your thoughts.