<p>15:51 <i>Behold, I tell you a mystery: We shall not all remain asleep, but we shall all be changed- </i>What is so mysterious here, what new revelation is there in this teaching of the resurrection of the body? Paul is after all re-stating the basics of the Gospel, as he has stated at the beginning of the chapter. I suggest that the new mystery revealed is that resurrection is additionally going to be a moral transformation. He has rebuked them earlier for having members who were 'sleeping' spiritually (1 Cor. 11:30). Some of them even would be changed by resurrection. See on :43,44 and :45 for discussion of the implications of this. The &quot;change&quot; in view is more than physical immortality- for &quot;the dead shall be raised incorruptible, and we shall be changed&quot;. The change is in addition to being made immortal. It is specifically associated with being made &quot;incorruptible&quot;, unable to be morally corrupted, unable to sin.</p>