Desire

[God is limitless], and that which is limitless cannot by its nature be understood. And so every desire for the beautiful which draws us on this ascent is intensified by the soul’s very progress towards it. And this is the real meaning of seeing God: never to have this desire satisfied. But fixing our eyes on those things which help us to see, we must ever keep alive in us the desire to see more and more. And so no limit can be set to our progress towards God: first of all, because no limitation can be put upon the beautiful, and secondly because the increase in our desire for the beautiful cannot be stopped by any sense of satisfaction.

— Gregory of Nyssa

Incomprehensibility

The more [the soul] approaches the vision [of God], so much the more does it see that the divine nature is invisible. It thus leaves all surface appearances, not only those that can be grasped by the senses but also those that the mind itself seems to see, and it keeps on going deeper until by the operation of the spirit it penetrates the invisible and incomprehensible, and it is here that it sees God. The true vision and the true knowledge of what we seek consists precisely in not seeing, in an awareness that our goal transcends all knowledge and is everywhere cut off from us by the darkness of incomprehensibility.

— Gregory of Nyssa