This too will pass.

I ask not for a lighter burden, but for broader shoulders.

First say to yourself what you would be, and then do what you have to do. Epictetus

A man cannot lose either the past or the future; for he has neither of them, and a man cannot lose what he doesn't have. Marcus Aurelius

No man is free who is not master of himself.

At dawn, when you have trouble getting out of bed, tell yourself: “I am rising to do the work of a human being. What do I have to complain about, if I’m going to do what I was born for—the things I was brought into the world to do? Or is this what I was created for? To huddle under the blankets and stay warm?” Marcus Aurelius, Med.5.1

Two elements must therefore be rooted out once and for all: The fear of future suffering, and the recollection of past suffering. Since the latter no longer concerns me, and the former concerns me not yet. Seneca

The cucumber is bitter? Then throw it out. There are brambles in the path? Then go around. That's all you need to know. Marcus Aurelius

If you accomplish something good with hard work, the labor passes quickly, but the good endures; if you do something shameful in pursuit of pleasure, the pleasure passes quickly, but the shame endures. Gaius Musonius Rufus, Fragment 51

Frodo: I wish the ring had never come to me... I wish none of this had happened.
Gandalf: So do all who live to see such times, but that is not for them to decide. All we have to decide is what to do with the time that is given us.
Tolkien, Fellowship of the Ring

I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinion of himself than on the opinion of others. Marcus Aurelius, Med.12.5

I have to die. If it is now, well then I die now; if later, then now I will take my lunch, since the hour for lunch has arrived - and dying I will tend to later. Epictetus