Thematic Bible: Why the body dies

If Christ is in you, though the body is dead because of sin, yet the spirit is alive because of righteousness. But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ Jesus from the dead will also give life to your mortal bodies through His Spirit who dwells in you.

But someone will say, "How are the dead raised? And with what kind of body do they come?" You fool! That which you sow does not come to life unless it dies; and that which you sow, you do not sow the body which is to be, but a bare grain, perhaps of wheat or of something else. read more.
But God gives it a body just as He wished, and to each of the seeds a body of its own.