Secret Rapture? Left Behind? No!

Is the Hebrews 4 rest a physical or spiritual rest? What about keeping the Sabbath? Why does 1 Corinthians 15 mention two kinds of bodies? Are we going to have two bodies? A pastor taught me the return of Christ might go unnoticed by many who are left behind. Could this be true?

Tags: 1 Corinthians 15, body, Hebrews 4, left behind, rapture, rest, resurrection, return of Christ, sabbath