who will pay the penalty: eternal destruction from the face of the Lord and from the glory of his might,

 There is all the wisdom of the wise leader in this opening passage. It seems that the Thessalonians had sent a message to Paul full of self-doubtings. They had been timorously afraid that their faith was not going to stand the test and that--in the expressive modern phrase--they were not going to make the grade. Paul's answer was not to push them further into the slough of despond by pessimistically agreeing with them but to pick out their virtues and achievements in such a way that these despondent, frightened Christians might square their shoulders and say, "Well, if Paul thinks that of us we'll make a fight of it yet." 