Plato, Laws 709c

συγχωρῆσαι τούτοις δεῖν ἕπεσθαι τέχνην· καιρῷ γὰρ χειμῶνος συλλαβέσθαι κυβερνητικὴν ἢ μή, μέγα πλεονέκτημα ἔγωγʼ ἂν θείην. ἢ πῶς; οὕτως. οὐκοῦν καὶ τοῖς ἄλλοις ὡσαύτως κατὰ τὸν αὐτὸν ἂν ἔχοι λόγον, καὶ δὴ καὶ νομοθεσίᾳ ταὐτὸν τοῦτο δοτέον· τῶν ἄλλων συμπιπτόντων, ὅσα δεῖ χώρᾳ συντυχεῖν, εἰ μέλλοι ποτὲ εὐδαιμόνως οἰκήσειν, τὸν νομοθέτην ἀληθείας ἐχόμενον τῇ τοιαύτῃ παραπεσεῖν ἑκάστοτε πόλει δεῖν. ἀληθέστατα λέγεις.

should cooperate with Occasion—verily I, for one, should esteem that a great advantage. Is it not so? It is. Then we must grant that this is equally true in the other cases also, by parity of reasoning, including the case of legislation. When all the other conditions are present which a country needs to possess in the way of fortune if it is ever to be happily settled, then every such State needs to meet with a lawgiver who holds fast to truth.