John Trapp on 2 Thessalonians 2:13

Verſe 13. But we are bound, &c.] Leſt they ſhould be diſcouraged with the former diſcourſe, the Apoſtle tels them that being elect they cannot be finally deceived. So the Authour to the Hebrews, Chap. 6.9. Zuinglius, after that he had terrified the wicked, was wont to come in which Bone vir, hoc nihil ad te. This is nothing to thee, thou faithfull Chriſtian. We cannot beat the dogs, but the children will cry, and muſt therefore be ſtilled and cheared up.

And belief of the truth] That is, of Chriſt the object, in the glaſſe of the Goſpel.