Gregory of Nyssa: "[...]we either convey the idea of goodness by the negation of badness, or vice versa."

"[...]we either convey the idea of goodness by the negation of badness, or vice versa (∆ι' ὧν ἢ τὸ χρηστότερον ἀναλαμβάνομεν νόημα διὰ τῆς τῶν πονηρῶν ἀποφάσεως, ἢ τὸ ἔμπαλιν ἐπὶ τὸ χεῖρον ταῖς ὑπονοίαις τρεπόμεθα, τῇ τῶν καλῶν ἀφαιρέσει τὸ πονηρὸν ἐνδειξάμενοι.). Well, then, if one thinks so with regard to the matter now before us, one will not fail to gain a proper conception of it. The question is,- What are we to think of Mind in its very essence? Now granted that the inquirer has had his doubts set at rest as to the existence of the thing in question, owing to the activities which it displays to us, and only wants to know what it is, he will have adequately discovered it by being told that it is not that which our senses perceive, neither a colour, nor a form, nor a hardness, nor a weight, nor a quantity, nor a cubic dimension, nor a point, nor anything else perceptible in matter; supposing, that is, that there does exist a something beyond all these." (De An. PG 46.37,On the Soul and the Resurrection, NPNF, p. 436)