A quote
Spite of all do you still chafe and complain, not understanding that, in all the evils to which you refer, there is really only one—the fact that you do chafe and complain? If you ask me, I think that for a man there is no misery unless there be something in the universe which he thinks miserable. I shall not endure myself on that day when I find anything unendurable. I am ill; but that is a part of my lot. My slaves have fallen sick, my income has gone off, my house is rickety, I have been assailed by losses, accidents, toil, and fear; this is a common thing. Nay, that was an understatement; it was an inevitable thing.
Seneca·Letter 96 — On Facing Hardships (§1)·trans. Gummere