Plato, Laws 687e

μηδὲν τῶν καλῶν καὶ τῶν δικαίων γιγνώσκων, εὔχηται μάλα προθύμως ἐν παθήμασιν ἀδελφοῖς ὢν τοῖς γενομένοις Θησεῖ πρὸς τὸν δυστυχῶς τελευτήσαντα Ἱππόλυτον, ὁ δὲ παῖς γιγνώσκῃ, τότε, δοκεῖς, παῖς πατρὶ συνεύξεται; μανθάνω ὃ λέγεις. λέγειν γάρ μοι δοκεῖς ὡς οὐ τοῦτο εὐκτέον οὐδὲ ἐπεικτέον, ἕπεσθαι πάντα τῇ ἑαυτοῦ βουλήσει, τὴν βούλησιν δὲ πολὺ μᾶλλον τῇ ἑαυτοῦ φρονήσει· τοῦτο δὲ καὶ πόλιν καὶ ἕνα ἡμῶν ἕκαστον καὶ εὔχεσθαι δεῖν καὶ σπεύδειν, ὅπως νοῦν ἕξει.

being devoid of all sense of right and justice, indulges in the vehement prayers of passion (like those of Theseus against Hippolytus, when he met his luckless end), while the son, on the contrary, has a sense of justice,—in this case do you suppose that the son will echo his father’s prayers? I grasp your meaning. You mean, as I suppose, that what a man ought to pray and press for is not that everything should follow his own desire, while his desire in no way follows his own reason; but it is the winning of wisdom that everyone of us, States and individuals alike, ought to pray for and strive after.