Still from letter 88:
“What,” you say, “does tomorrow never prove me wrong? Whatever happens without my knowledge proves me wrong.” I, for my part, do not know what is to be, but I do know what may come to be. I shall have no misgivings in this matter; I await the future in its entirety; and if there is any abatement in its severity, I make the most of it. If the morrow treats me kindly, it is a sort of deception; but it does not deceive me even at that. For just as I know that all things can happen, so I know, too, that they will not happen in every case. I am ready for favourable events in every case, but I am prepared for evil.
The Daily Stoic 