You don't resent your weight. Why resent your years?

The source

"You don't resent your weight. Why resent your years?" Marcus Aurelius said it in Meditations 6.49. Translated from the original Greek by Spartan Surfers.

"Μήτι δυσχεραίνεις ὅτι τοσῶνδέ τινων λιτρῶν εἶ καὶ οὐ τριακοσίων; οὕτω δὴ καὶ ὅτι μέχρι τοσῶνδε ἐτῶν βιωτέον σοι"

Original Greek, Meditations 6.49. Greek: Leopold 1908 (Teubner) via Perseus.

Who said it

Marcus Aurelius (121–180 AD). Roman emperor who wrote private notes to himself on a military campaign. We know them as the Meditations.

Questions

Who said "You don't resent your weight. Why resent your years?"?

Marcus Aurelius (121–180 AD). Source: Meditations 6.49.

What is the original Greek?

Μήτι δυσχεραίνεις ὅτι τοσῶνδέ τινων λιτρῶν εἶ καὶ οὐ τριακοσίων; οὕτω δὴ καὶ ὅτι μέχρι τοσῶνδε ἐτῶν βιωτέον σοι. Translated from the original Greek by Spartan Surfers.