Aurelius.

“It is not death that a man should fear, but he should fear never beginning to live."

"Think of the life you have lived until now as over and, as a dead man, see what’s left as a bonus and live it."

"Even if you’re going to live three thousand more years, or ten times that, remember: you cannot lose another life than the one you’re living now, or live another one than the one you’re losing. The longest amounts to the same as the shortest. The present is the same for everyone; its loss is the same for everyone; and it should be clear that a brief instant is all that is lost. For you can’t lose either the past or the future; how could you lose what you don’t have? Remember two things:

i. that everything has always been the same, and keeps recurring, and it makes no difference whether you see the same things recur in a hundred years or two hundred, or in an infinite period;

ii. that the longest-lived and those who will die soonest lose the same thing. The present is all that they can give up, since that is all you have, and what you do not have, you cannot lose.

“Concentrate every minute like a Roman—like a man—on doing what’s in front of you with precise and genuine seriousness, tenderly, willingly, with justice. And on freeing yourself from all other distractions. Yes, you can—if you do everything as if it were the last thing you were doing in your life, and stop being aimless, stop letting your emotions override what your mind tells you, stop being hypocritical, self-centered, irritable. You see how few things you have to do to live a satisfying and reverent life? If you can do all that, that is all even the gods can ask of you.”