[Thanks to Matt for this post]
“We must consider both the real purpose and all the evidence of direct perception, to which we always refer the conclusions of opinion; otherwise, all will be full of doubt and confusion.”
-Principal Doctrine 22
“τὸ ὑφεστηκὸς δεῖ τέλος ἐπιλογίζεσθαι καὶ πᾶσαν τὴν ἐνάργειαν, ἐφʼ ἣν τὰ δοξαζόμενα ἀνάγομεν· εἰ δὲ μὴ πάντα ἀκρισίας καὶ ταραχῆς ἔσται μεστά.”