Do not act as if thou wert going to live ten thousand years. Death hangs over thee. While thou livest, while it is in thy power, be good.

More from Meditations

• Do every act of thy life as if it were the last.
• Since it is possible that thou mayest depart from life this very moment, regulate every act and thought accordingly.
• Every man lives only this present time, which is an indivisible point, and all the rest of his life is either past or it is uncertain.
• Men seek retreats for themselves, houses in the country, sea-shores, and mountains; and thou too art wont to desire such things very much. But this is altogether a mark of the most common sort of men, for it is in thy power whenever thou shalt choose to retire into thyself. For nowhere either with more quiet or more freedom from trouble does a man retire than into his own soul.
• Take away thy opinion, and then there is taken away the complaint, 'I have been harmed.' Take away the complaint, 'I have been harmed,' and the harm is taken away.
• In the morning when thou risest unwillingly, let this thought be present -- I am rising to the work of a human being.