Marcus Aurelius (April 26, 121 - March 17, 180), was Roman Emperor from 161 to 180. He ruled with Lucius Verus as co-emperor from 161 until Verus' death in 169. He was the last of the Five Good Emperors, and is also considered one of the most important Stoic philosophers. (Click for full Wikipedia article.)
A man should be upright, not kept upright.
A wrongdoer is often a man who has left something undone, not always one who has done something.
All is ephemeral- fame and the famous as well.
All men are made one for another: either then teach them better, or bear with them.
Be not careless in deeds, nor confused in words, nor rambling in thought.
Consider that everything is opinion, and opinion is in thy power.
Every man's life lies within the present; for the past is spent and done with, and the future is uncertain.
He who lives in harmony with himself lives in harmony with the universe.
How many together with whom I came into the world are already gone out of it.
How much more grievous are the consequences of anger than the causes of it.
If you are pained by external things, it is not they that disturb you, but your own judgment of them. And it is in your power to wipe out that judgment now.
Let the wrong which is done by a man stay there where the wrong was done.
Our life is what our thoughts make it.
Reject your sense of injury and the injury itself disappears.
Remember that what pulls the strings is the force hidden within; there lies the power to persuade, there the life- there, if one must speak out, the real man.
Soon you will have forgotten the world, and soon the world will have forgotten you.
The opinion of 10,000 men is of no value if none of them know anything about the subject.
The sole thing of which any man can be deprived is the present; since this is all he owns.
Time is a sort of river of passing events, and strong is its current; no sooner is a thing brought to sight than it is swept by and another takes its place, and this too will be swept away.
To refrain from imitation is the best revenge.
Waste no more time arguing what a good man should be. Be one.
What is not good for the swarm is not good for the bee.
You may break your heart, but men will still go on as before.
You will find rest from vain fancies if you perform every act in life as though it were your last.