“The Godhead, my dear Theotimus, is to us what the air is to the birds and the sea to the fish. One day we will [fly] through this divine element and swim in this sea and rejoice that our powers are not sufficient to embrace the whole space. It will be an ever-new delight for us to see that God—even if giving himself to us without restraint or limitation—still remains an abyss we are not capable of plumbing: we cannot enjoy him in a manner that does justice to the infinity of his perfections, for these shall always transcend our power of comprehension. Incomprehensibility is the essential mark of the beauty we will behold in paradise. This beauty would not be infinite, it would not be God, if we could comprehend it.” FRANCIS DE SALES
Hans Urs von Balthasar, The Grain of Wheat: Aphorisms (1953), chapter titled God
[Note: In what I think is a typo, the ebook has the word "fry" instead of "fly".]