Meditations 6.20

In the gymnastic exercises suppose that a man has torn thee with his nails, and by dashing against thy head has inflicted a wound. Well, we neither show any signs of vexation, nor are we offended, nor do we suspect him afterwards as a treacherous fellow; and yet we are on our guard against him, not however as an enemy, nor yet with suspicion, but we quietly get out of his way. Something like this let thy behavior be in all the other parts of life; let us overlook many things in those who are like antagonists in the gymnasium. For it is in our power, as I said, to get out of the way, and to have no suspicion nor hatred.

Marcus Aurelius, Meditations 6.20, translated by George Long

Suppose that a competitor in the ring has gashed us with his nails and butted us violently with his head, we do not protest or take it amiss or suspect our opponent in future of foul play. Still we do keep an eye on him, not indeed as an enemy, or from suspicion of him, but with good-humoured avoidance. Act much in the same way in all the other parts of life. Let us make many allowances for our fellow-athletes as it were. Avoidance is always possible, as I have said, without suspicion or hatred.

Marcus Aurelius, Meditations 6.20, translated by C. R. Haines