The Meditations (Book Two) by Marcus Aurelius
In this piece we are reminded that each day we will meet some good people and terrible people alike. But we have faults too, so we should not be angry with them. For we are all just bits of blood, bones and breath. Life is fleeting, our bodies will decay. As for death, it is nothing to fear, it can’t hurt us. But the most important part of us is our minds. We shouldn’t let them be slaves to selfish passions, quarrel with fate, or be anxious of the present or afraid of the future. We cannot guarantee fame or fortune, but we can keep our minds calm and free from injury, a state superior to pleasure and pain. True freedom is the control of our minds.
Nicomachean Ethics (Book Two)