Jesus said, unless a grain of wheat falls to the earth and dies, it remains alone; but if it dies, it bears much fruit.

A seed pod, so full of life and potential in itself, must fully surrender itself and die, become useless and dead, because the plant, which bears the fruit, grows from the life inside the seed, splitting apart and causing it to die. But without the seed, the plant has no chance of life.   

Similarly, the Apostle Paul explained the resurrection to the doubtful Corinthians, in I Corinthians 15:35 that the dead are raised in the resurrection because the seed—Jesus Christ—surrendered himself and died for our sins and was buried  in the ground, but like Him, the seed, was not what will be raised in the resurrection.

For then, we will be raised glorified, with the glory of a heavenly body, just like Christ was. Verse 49 promises us that, just as we have borne the image of the man of dust, so shall we also bear the image of the Man of Heaven, Jesus Christ.  Praise the Lord!!