Thematic Bible: Why the body dies

And if Christ be in you, the body is dead because of sin; but the Spirit is life because of righteousness. But if the Spirit of him that raised up Jesus from the dead dwells in you, he that raised up Christ from the dead shall also bring to life your mortal bodies by his Spirit that dwells in you.

But some man will say, How are the dead raised up? and with what body do they come? You fool, that which you sow is not made alive, except it die: And that which you sow, you sow not that body that shall be, but bare grain, it may by chance be wheat, or of some other grain: read more.
But God gives it a body as it has pleased him, and to every seed its own body.