What does 1 Corinthians 15:38 mean?

But someone will say, “How are the dead raised?” and, “With what kind of body do they come?”

You foolish one, that which you yourself sow is not made alive unless it dies.

That which you sow, you don’t sow the body that will be, but a bare grain, maybe of wheat, or of some other kind.

All flesh is not the same flesh, but there is one flesh of men, another flesh of animals, another of fish, and another of birds.

There are also celestial bodies, and terrestrial bodies; but the glory of the celestial differs from that of the terrestrial.

There is one glory of the sun, another glory of the moon, and another glory of the stars; for one star differs from another star in glory.