consider 1 Corinthians 13:10-13 But when that which is perfect is come, then that which is in part shall be done away. [11] When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things. [12] For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known. [13] And now abideth (remain)faith, hope, charity, these three; but the greatest of these is charity.
with 2 Corinthians 3:14-18 But their minds were blinded: for until this day remaineth the same vail untaken away in the reading of the old testament; which vail is done away in Christ. [15] But even unto this day, when Moses is read, the vail is upon their heart. [16] Nevertheless when it shall turn to the Lord, the vail shall be taken away. [17] Now the Lord is that Spirit: and where the Spirit of the Lord is, there is liberty. [18] But we all, with open face beholding as in a glass the glory of the Lord, are changed into the same image from glory to glory, even as by the Spirit of the Lord.
“Then that which is in part shall be done away”: ”cease” “passes away” “vanish”...which vail is done away with in Christ. now abideth (remain), these three Faith, Hope, Charity. As He said “you may abide in Me, and I in you.” See your point of “let all things be done for edification” and “for the perfecting of the Saints.” Strengthen that which remains. And “you are complete in Him”.