"Holy love has a way of consuming some. This is what is meant by the one who said, 'You have ravished our hearts' (Sg. Of Sgs. 4:9). And it makes others bright and overjoyed. In this regard it has been said: 'My heart was full of trust and I was helped, and my flesh has revived' (Ps. 27:7). For when the heart is cheerful, the face beams (cf. Prov. 15:13), and a man flooded with the love of God reveals in his body, as if in a mirror, the splendor of his soul, a glory like that of Moses when he came face to face with God (cf. Ex. 34:29-35)."

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No one has yet discovered or ever shall discover what God is in His nature and essence... we shall, in time to come, 'know as we are known' (I Cor 13:12). But for the present what reaches us is a scant emanation, as it were a small beam from a great light - which means that any one who 'knew' God or whose 'knowledge' of Him has been attested to in the Bible, has a manifestly more brilliant knowledge than others not equally illuminated. This superiority was reckoned knowledge in the full sense, not because it really was so, but by the contrast of relative strengths.

— Gregory of Nazianzus