John Stott on the closing verses of 2 Timothy:
Paul is fully alert to the difficulties, however, both internal and external. Timothy himself is inexperienced, infirm and shy. The world’s opposition is strong and subtle. And behind these things stands the devil, bent on ‘taking men alive’ and keeping them prisoner. For the devil hates the gospel and uses all his strength and cunning to obstruct its progress, now by perverting it in the mouths of those who preach it, now by frightening them into silence through persecution or ridicule, now by persuading them to advance beyond it into some fancy novelty, now by making them so busy with defending the gospel that they have no time to proclaim it.