Thematic Bible: Why the body dies

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

But someone will say, How are the dead raised up? and with what body do they come? Thou fool, that which thou sowest is not brought to life, unless it dies first; and that which thou sowest, thou sowest not the body that shall be, but bare grain: it may be of wheat or of some other grain; read more.
but God gives it a body as it has pleased him, and to each seed its own body.