Those enjoying prosperity should always be ready to assist the unfortunate, for no one can say what the future may bring forth.
δεῖ γὰρ τοὺς εὐτυχοῦντας περὶ τῶν ἀτυχούντων ἀεὶ φαίνεσθαι τὰ βέλτιστα βουλευομένους, ἐπειδήπερ ἄδηλον τὸ μέλλον ἅπασιν ἀνθρώποις.
Original text (Ancient Greek)