Socrates says:

ΤΟ ΕΠΙΜΕΛΕΙΣΘΑΙ ΕΑΥΤΟΥ ΕΣΤΙΝ ΕΠΙΜΕΛΕΙΣΘΑΙ ΤΗΣ ΨΥΧΗΣ / To care for oneself is to care for the soul.

ΟΥ ΤΑ ΧΡΗΜΑΤΑ ΥΜΑΣ ΠΟΙΕΙΝ ΑΛΛΑ ΤΗΝ ΨΥΧΗΝ ΩΣ ΑΡΙΣΤΗΝ ΕΙΝΑΙ / Care not for your bodies or your wealth so much as for the best possible state of your soul.

the concept of EPIMELESTHAI ("care for one's self / care for the soul) is key concept of classical philosophical tradition