For if the dead rise not ... - This is a repetition of what is said in 1 Corinthians 15:13. It is repeated here, evidently, because of its importance. It was a great and momentous truth which would “bear” repetition, that if there was no resurrection, as some held, then it would follow that the Lord Jesus was not raised up.
Related Commentaries of 1 Corinthians 15:16
1 Corinthians 15:16
16 For if the dead rise not, then is not Christ raised: