Albert Barnes Commentary 1 Corinthians 15:49

"And as we have borne the image of the earthy, we shall also bear the image of the heavenly." — 1 Corinthians 15:49 (ASV)

And as we have borne the image of the earthy. As, like our first father, we are frail, decaying, dying; as we are so closely connected with him as to be like him. This does not refer mainly to one bearing his moral character, but to the fact that we are, like him, subject to sickness, frailty, sorrow, and death.

We shall also bear the image of the heavenly. The Lord Jesus Christ, who was from heaven, and who is in heaven. As we are so closely connected with Adam as to resemble him, so by the Divine arrangement, and by faith in the Lord Jesus, we are so closely connected with Him that we shall resemble Him in heaven.

And as He is now free from frailty, sickness, pain, sorrow, and death, and as He has a pure and spiritual body, adapted to a residence in heaven, so shall we be in that future world.

The argument here is that the connection formed between the believer and the Savior is as close as that which existed between the believer and Adam. And as that connection with Adam involved the certainty that the believer would be subjected to pain, sin, sickness, and death, so the connection with Christ involves the certainty that the believer will, like Him, be free from sin, sickness, pain, and death, and, like Him, will have a body that is pure, incorruptible, and immortal.