Appearances to the mind are of four kinds. Things either are what they appear to be; or they neither are, nor appear to be; or they are, and do not appear to be; or they are not, and yet appear to be. Rightly to aim in all these cases is the wise man's task.
Τετραχῶς αἱ φαντασίαι γίνονται ἡμῖν· ἢ γὰρ ἔστι τινὰ ⟨καὶ⟩ οὕτως φαίνεται ἢ οὐκ ὄντα οὐδὲ φαίνεται ὅτι ἔστιν ἢ ἔστι καὶ οὐ φαίνεται ἢ οὐκ ἔστι καὶ φαίνεται. λοιπὸν ἐν πᾶσι τούτοις εὐστοχεῖν ἔργον ἐστὶ τοῦ πεπαιδευμένου.
Original text (Ancient Greek)