What is the difference between Amulek’s assertion that those who have procrastinated the day of their repentance until death becoming subject to the spirit of the devil, and the ability of men to learn the gospel and repent in the next life? The difference is the implication that there is full opportunity to receive the gospel in this life. What Amulek is saying is that if they have the full opportunity to learn the gospel, and reject it not because of disbelief, but because of procrastination of the effort required to live the gospel, then they will be subject to the spirit of the devil. Those are people who never allowed the power of the gospel in their hearts in spite of understanding that they should. Such people have already rejected the gospel, and will not change that rejection in the next life.