“While Gregory [of Nyssa]is regularly described by scholars as a “Platonist’, in fact he contrasts the inherent certainty of sense knowledge with the inherent uncertainty of abstract knowledge (or in Gregory’s terms, knowledge of sensibles verses knowledge of intelligibles). Sense knowledge is clear and certain; knowledge by intellect alone is neither. This positive evaluation of the world of sensibles leads Gregory to see creation as a trustworthy sign of its Creator; indeed, one striking feature of Gregory’s theology is the confidence with which he believes that the evidence of creation bears out his theology. This confidence depends on Gregory’s theological shift from the one Creator reasoning to the one God reasoning I have outlined, but in Gregory’s case this shift is supported by his definite sense of the veracity and the virtue of material creation.”
Michel Barnes, Dunamis in Gregory of Nyssa’s Trinitarian Theology, 254.