And the dead in Christ will rise first. Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord. Therefore comfort one another with these words. This is called the Rapture .
Rapture means 'caught up', 'snatched away'.
First, He is going to renew and change the bodies of dead Christians. Then He's going to take their spirit bodies and put them back into their renewed physical bodies. People will be coming right up out of the ground in renewed, living physical bodies. Their spirits were in Heaven, but now they'll be back in a physical body. And those who believe Jesus but have not died will be changed, and they will float up in the air and meet Jesus.