Die noble. Marcus Aurelius 4.17

Marcus Aurelius does not want immortality. Faced with the choice presented by Unamuno, between eschatology and ethics, he chooses the latter boldly.

Μὴ ὡς μύρια μέλλων ἔτη ζῆν. τὸ χρεὼν ἐπήρτηται· ἕως ζῇς, ἕως ἔξεστιν, ἀγαθὸς γενοῦ.

Do not live as though you might last thousands of years. The limit of your lot is set: as you dwell in its little moment and then depart, be noble.