Thematic Bible: Why the body dies

But if the Messiah is in you, your bodies are dead due to sin, but the spirit is alive due to righteousness. And if the Spirit of the one who raised Jesus from the dead is living in you, then the one who raised the Messiah from the dead will also make your mortal bodies alive by his Spirit who lives in you.

But someone will ask, "How are the dead raised? What kind of body will they have when they come back?" You fool! The seed you plant does not come to life unless it dies, and what you plant is not the form that it will be, but a bare kernel, whether it is wheat or something else. read more.
But God gives the plant the form he wants it to have, and to each kind of seed its own form.