What does Les say he shudders to think about?

Les explains that Paul is amazed the Galatians are so soon removed from Him who called them into the grace of Christ into another gospel, which is not another. He notes that some were troubling them and wanting to pervert the gospel. Les defines perversion not as something only in the gutter but as anything that twists the truth far enough to be off-center and mislead people. He points out that someone was telling the Galatians they had to keep the Mosaic Law, and that was a perversion. Then Paul says even if an angel from heaven preaches any other gospel, let him be accursed. Les calls that powerful language and says he shudders to think of the end of someone who takes this gospel and perverts it.