Plato, Laws 716d

καὶ κατὰ τοῦτον δὴ τὸν λόγον ὁ μὲν σώφρων ἡμῶν θεῷ φίλος, ὅμοιος γάρ, ὁ δὲ μὴ σώφρων ἀνόμοιός τε καὶ διάφορος καὶ ὁ ἄδικος, καὶ τὰ ἄλλʼ οὕτως κατὰ τὸν αὐτὸν λόγον ἔχει. νοήσωμεν δὴ τούτοις ἑπόμενον εἶναι τὸν τοιόνδε λόγον, ἁπάντων κάλλιστον καὶ ἀληθέστατον οἶμαι λόγων, ὡς τῷ μὲν ἀγαθῷ θύειν καὶ προσομιλεῖν ἀεὶ τοῖς θεοῖς εὐχαῖς καὶ ἀναθήμασιν καὶ συμπάσῃ θεραπείᾳ θεῶν κάλλιστον καὶ ἄριστον καὶ ἀνυσιμώτατον πρὸς τὸν εὐδαίμονα

since he is like him, while he that is not temperate is unlike and at enmity,—as is also he who is unjust, and so likewise with the rest, by parity of reasoning. On this there follows, let us observe, this further rule,—and of all rules it is the noblest and truest,—that to engage in sacrifice and communion with the gods continually, by prayers and offerings and devotions of every kind, is a thing most noble and good and helpful towards the happy life, and superlatively fitting also, for the good man;