Καὶ καθάπερ Ἡράκλειτος λέγεται πρὸς τοὺς ξένους εἰπεῖν τοὺς βουλομένους ἐντυχεῖν αὐτῷ, οἳ ἐπειδὴ προσιόντες εἶδον αὐτὸν θερόμενον πρὸς τῷ ἰπνῷ ἔστησαν (ἐκέλευε γὰρ αὐτοὺς εἰσιέναι θαρροῦντας· εἶναι γὰρ καὶ ἐνταῦθα θεούς), οὕτω καὶ πρὸς τὴν ζήτησιν περὶ ἑκάστου τῶν ζῴων προσιέναι δεῖ μὴ δυσωπούμενον, ὡς ἐν ἅπασιν ὄντος τινὸς φυσικοῦ καὶ καλοῦ.
(Aristotle, Part. An. 645a19-24)
And just as Heraclitus is said to have spoken to the visitors, who were wanting to meet him but stopped as they were approaching when they saw him warming himself at the oven—he kept telling them to come in and not to worry, “fore there are gods here too”—so we should approach the inquiry about each animal without aversion, knowing that in all of them there is something natural and beautiful. (tr. David M. Balme)