Albert Barnes Commentary 1 Corinthians 15:40

"There are also celestial bodies, and bodies terrestrial: but the glory of the celestial is one, and the [glory] of the terrestrial is another." — 1 Corinthians 15:40 (ASV)

There are also celestial bodies. The planets; the stars; the host of heaven. (See 1 Corinthians 15:41).

And bodies terrestrial. On earth; earthly. He refers here to the bodies of men, beasts, birds, etc.; perhaps also of trees and vegetables. The sense is:

"There is a great variety of bodies. Look upon the heavens and see the splendor of the sun, the moon, and the stars. And then look upon the earth and see the bodies there—the bodies of men, brutes, and insects. You see here two entire classes of bodies. You see how they differ. Can it be considered strange if there should be a difference between our bodies when on earth and when in heaven? Do we not, in fact, see a vast difference between what strikes our eye here on earth and in the sky? And why should we consider it strange that between bodies adapted to live here and bodies adapted to live in heaven there should be a difference, like that which is seen between the objects which appear on earth and those which appear in the sky?"

The argument is a popular one, but it is striking and fulfills the objective he has in view.

The glory of the celestial is one. The splendor, beauty, dignity, and magnificence of the heavenly bodies differs greatly from those on earth. That is one thing; the beauty of earthly objects is another and a different thing. Beautiful as the human frame may be, beautiful as the plumage of birds may be, beautiful as flowers, fossils, minerals, topaz, or diamonds may be, yet they differ from the heavenly bodies and are not to be compared with them. Why should we consider it strange that there may be a similar difference between the body as adapted to its residence here and as adapted to its residence in heaven?