§8.29.1Ἐξάλειφε τὰς φαντασίας συνεχῶς σεαυτῷ λέγων· νῦν ἐπ’ ἐμοί ἐστιν ἵνα ἐν ταύτῃ τῇ ψυχῇ μηδεμία πονηρία ᾖ μηδὲ ἐπιθυμία μηδὲ ὅλως ταραχή τις, ἀλλὰ βλέπων πάντα ὁποῖά ἐστι χρῶμαι ἑκάστῳ κατ’ ἀξίαν. μέμνησο ταύτης τῆς ἐξουσίας κατὰ φύσιν.
Wipe out your impressions, constantly saying to yourself: 'Now it is in my power to ensure that in this soul there be no wickedness, nor desire, nor any trouble at all, but that, seeing all things as they are, I use each according to its value.' Remember this power according to nature.