Had the secret Paul reveals ever been hinted at or spoken before?
No. The secret Paul reveals had never been alluded to, hinted at, or spoken beforehand. God had the right to keep it hidden until He revealed it. That secret is that toward the end of time a group of believers will not die physically but will all be changed.
Les explains that what is now being unveiled had never been alluded to, never hinted at, and certainly never spoken before. God had the right to keep it secret, and He revealed these things first to Paul. The secret concerns a point toward the end of time when a group of believers will not die physically; instead, they shall all be changed. Les ties this to the resurrected body fashioned after Christ’s resurrection body—like our physical body but different, a spiritual body without blood, flesh and bone but no blood, activated by the Spirit. Paul writes as though it could happen in his lifetime, so this line of teaching calls it the imminent coming of Christ for the Church, to be expected at any time, with no set prophetic program to be fulfilled.