“For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.”
King James Version (KJV)
4:14 So - As God raised him. With him - With their living head.
1Th 4:14 For if we believe that Jesus died and rose again, etc. If we believe in the death and resurrection of Christ, we must believe also that all who sleep in him will be raised with him.