One life each. Don't stake your happiness on other minds.

The source

"One life each. Don't stake your happiness on other minds." Marcus Aurelius said it in Meditations 2.6. Translated from the original Greek by Spartan Surfers.

"εἷς γὰρ ὁ βίος ἑκάστῳ, οὗτος δέ σοι σχεδὸν διήνυσται, μὴ αἰδουμένῃ σεαυτήν, ἀλλ’ ἐν ταῖς ἄλλων ψυχαῖς τιθεμένῃ τὴν σὴν εὐμοιρίαν."

Original Greek, Meditations 2.6. 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 "One life each. Don't stake your happiness on other minds."?

Marcus Aurelius (121–180 AD). Source: Meditations 2.6.

What is the original Greek?

εἷς γὰρ ὁ βίος ἑκάστῳ, οὗτος δέ σοι σχεδὸν διήνυσται, μὴ αἰδουμένῃ σεαυτήν, ἀλλ’ ἐν ταῖς ἄλλων ψυχαῖς τιθεμένῃ τὴν σὴν εὐμοιρίαν. Translated from the original Greek by Spartan Surfers.