When you lose your temper or even feel irritated: remember that human life is very short. Before long all of us will be laid out side by side.
Anywhere you can lead your life, you can lead a good one.
Remember how long thou hast already put off these things, and how often a certain day and hour as it were, having been set unto thee by the gods, thou hast neglected it.
But death certainly, and life, honour and dishonour, pain and pleasure, all these things equally happen to good men and bad, being things which make us neither better nor worse. Therefore they are neither good nor evil.
Think of the universal substance, of which thou has a very small portion; and of universal time, of which a short and indivisible interval has been assigned to thee; and of that which is fixed by destiny, and how small a part of it thou art.
When they're really possessed by what they do, they'd rather stop eating and sleeping than give up practicing their arts.