But when that which is perfect is come, then that which is in part shall be done away.
Read Chapter 13
Ambrose of Milan
AD 397
For now we know in part and understand in part. But then we shall be able to comprehend what is perfect, when not the shadow but the reality of the majesty and eternity of God shall begin to shine and to reveal itself unveiled before our eyes.
Everything which is imperfect will be destroyed. But destruction occurs by making the imperfect perfect, not by removing it altogether. Commentary on Paul’s Epistles.
But, as this faith, which works by love, begins to penetrate the soul, it tends, through the vital power of goodness, to change into sight, so that the holy and perfect in heart catch glimpses of that ineffable beauty whose full vision is our highest happiness… . We begin in faith, we are perfected in sight.
Even though more knowledge is always being acquired by everyone, it will ever fall short in all things of its rightful completeness until the time when that which is perfect being comes, that which is in part will be done away. .
St. Augustine proves from this text, that the saints in heaven have a more perfect knowledge of what passes here below, than when they sojourned on earth. (De Civit. Dei. lib. xxii. chap. 29.)
What is implied from this is not that our knowledge will disappear altogether, but that its imperfections will be seen as very limited. We shall know everything we know now imperfectly, but so much more as well. For example, we know now that God is everywhere, but we do not know how this is possible. We know that he made the creation out of nothing, but we have no idea how. We know that Christ was born of a virgin, but we do not know how. And so on.
Since that which is perfect has not yet come to us; namely, the kingdom of heaven and the resurrection, when "that which is in part shall be done away."