Eboēthoumen

Εἰ πάντες ἐβοηθοῦμεν ἀλλήλοις ἀεί,
οὐδεὶς ἂν ὢν ἄνθρωπος ἐδεήθη τύχης.
(Menander, fr. 679)

If always all of us brought help to one another, no human being would have needed Fortune’s aid. (tr. Francis G. Allinson)