Marcus Aurelius — "You could leave life right now. Let that determine what you do and say and think…"

"Everything that happens, happens as it should, and if you observe carefully, you will find this to be so."

"Think of yourself as dead. You have lived your life. Now, take what's left and live it properly."

"The faculty of reason is the only one which can contemplate itself, and by itself distinguish truth from falsehood, and the real from the unreal."

"How many have been afraid of death and yet have died laughing?"

"Do not waste the remainder of thy life in thoughts about others, when thou dost not refer thy thoughts to some object of common utility. For thou wilt lose thy opportunity for doing anything else."