From Porphyry’s on Styx [Fragments preserved in Stobaeus 1.49.50]
“The notion explored is that the souls [of the dead] are like images which appear in mirrors or those on the surface of water which appear to resemble us completely and imitate our movements but have no solid matter for grasping or touching. This is why he calls them “images of exhausted men” (11.476)
῾Υποτίθεται γὰρ τὰς ψυχὰς τοῖς εἰδώλοις τοῖς ἐν τοῖς κατόπτροις φαινομένοις ὁμοίας καὶ τοῖς διὰ τῶν ὑδάτων συνισταμένοις, ἃ καθάπαξ ἡμῖν ἐξείκασται καὶ τὰς κινήσεις μιμεῖται, στερεμνιώδη δ’ ὑπόστασιν οὐδεμίαν ἔχει εἰς ἀντίληψιν καὶ ἁφήν· ὅθεν αὐτὰς ‘βροτῶν εἴδωλα καμόντων’ (λ 476) λέγει.”
From Porphyry’s comments on Kirkê and the transformation of the soul (Stobaeus, 126.96.36.199):
“These things are no longer myth and poetry, but the truth and an account of nature.”
Καὶ οὐκέτι ταῦτα μῦθος οὐδὲ ποίησις, ἀλλὰ ἀλήθεια καὶ φυσικὸς λόγος.