And that which thou sowest, thou sowest not that body that shall be, but bare grain, it may chance of wheat, or of some other grain:

People's New Testament

15:37 And that which thou sowest... bare grain. We sow, not the plant that comes forth, but only a bare seed.

Wesley's Notes

15:37 Thou sowest not the body that shall be - Produced from the seed committed to the ground, but a bare, naked grain, widely different from that which will afterward rise out of the earth.

Jamieson-Fausset-Brown Bible Commentary

37. not that body that shall be-a body beautiful and no longer a "bare grain" [Bengel]. No longer without stalk or ear, but clothed with blade and ears, and yielding many grains instead of only one [Grotius]. There is not an identity of all the particles of the old and the new body. For the perpetual transmutation of matter is inconsistent with this. But there is a hidden germ which constitutes the identity of body amidst all outward changes: the outward accretions fall off in its development, while the germ remains the same. Every such germ ("seed," 1Co 15:38) "shall have its own body," and be instantly recognized, just as each plant now is known from the seed that was sown (see on [2294]1Co 6:13). So Christ by the same image illustrated the truth that His death was the necessary prelude of His putting on His glorified body, which is the ground of the regeneration of the many who believe (Joh 12:24). Progress is the law of the spiritual, as of the natural world. Death is the avenue not to mere revivification or reanimation, but to resurrection and regeneration (Mt 19:28; Php 3:21). Compare "planted," &c., Ro 6:5.

Matthew Henry's Concise Commentary

15:35-50 1. How are the dead raised up? that is, by what means? How can they be raised? 2. As to the bodies which shall rise. Will it be with the like shape, and form, and stature, and members, and qualities? The former objection is that of those who opposed the doctrine, the latter of curious doubters. To the first the answer is, This was to be brought about by Divine power; that power which all may see does somewhat like it, year after year, in the death and revival of the corn. It is foolish to question the Almighty power of God to raise the dead, when we see it every day quickening and reviving things that are dead. To the second inquiry; The grain undergoes a great change; and so will the dead, when they rise and live again. The seed dies, though a part of it springs into new life, though how it is we cannot fully understand. The works of creation and providence daily teach us to be humble, as well as to admire the Creator's wisdom and goodness. There is a great variety among other bodies, as there is among plants. There is a variety of glory among heavenly bodies. The bodies of the dead, when they rise, will be fitted for the heavenly bodies. The bodies of the dead, when they rise, will be fitted for the heavenly state; and there will be a variety of glories among them. Burying the dead, is like committing seed to the earth, that it may spring out of it again. Nothing is more loathsome than a dead body. But believers shall at the resurrection have bodies, made fit to be for ever united with spirits made perfect. To God all things are possible. He is the Author and Source of spiritual life and holiness, unto all his people, by the supply of his Holy Spirit to the soul; and he will also quicken and change the body by his Spirit. The dead in Christ shall not only rise, but shall rise thus gloriously changed. The bodies of the saints, when they rise again, will be changed. They will be then glorious and spiritual bodies, fitted to the heavenly world and state, where they are ever afterwards to dwell. The human body in its present form, and with its wants and weaknesses, cannot enter or enjoy the kingdom of God. Then let us not sow to the flesh, of which we can only reap corruption. And the body follows the state of the soul. He, therefore, who neglects the life of the soul, casts away his present good; he who refuses to live to God, squanders all he has.