ὡς μὲν οὖν ἡ τμῆσις καὶ ἡ ὅρασις, οὕτω καὶ ἡ ἐγρήγορσις ἐντελέχεια, ὡς δʼἡ ὄψις καὶ ἡ δύναμις τοῦ ὀργάνου, ἡ ψυχή· τὸ δὲ σῶμα τὸ δυνάμει ὄν· ἀλλʼὥσπερ ὀφθαλμὸς ἡ κόρη καὶ ἡ ὄφις, κἀκεῖ ἡ ψυχὴ καὶ τὸ σῶμα ζῷον.