Not soon shaken. — The meaning would be clearer if we inserted “so” before “soon,” for it does not mean vaguely that they were for the future not to be lightly shaken, but (as in Galatians 1:6) that they had already been shaken, and that in an unconscionably short time since their first teaching on the subject.
In mind. — In the original it is, from your mind; from your reason,
Be troubled. — The tense of the verb “be troubled” differs in the Greek from that of “be shaken”; for the “driving out of their wits” is regarded as a single act; the “agitation,” or being troubled, as a chronic condition, into which there was fear of their falling. This shaking and trouble probably brought about the disorders spoken of in 2 Thessalonians 3. The instruments by which men had partly driven the Thessalonians out of their wits already were three: — (1) “Through spirit,” i.e., by pretended manifestations of the Holy Spirit’s power, whether through false signs or, more probably, through “prophesyings.” (See 1 Thessalonians 5:20-22, where the fear of some abuse of prophecy is clearly marked already.) (2) “Through word,” i.e., Word of mouth, as opposed to the written letter next mentioned. Most modern commentators seem rightly to take the words “as from us” with this clause as well as with the next; some persons misrepresented what they had heard the Apostles say on the topic, or pretended to have been intrusted with a message from them. (3) “Through letter;” apparently forged letters, purporting to be from (or, literally, through) St. Paul, had been circulated. (See Note on 2 Thessalonians 3:17.) “Word” and “letter” occur again in 2 Thessalonians 2:15 as his ordinary means of teaching.
As that the day of Christ is at hand — i.e., “to the effect that it is, ” — giving the contents of the pretended revelation; for “as that” follows grammatically upon “spirit, word, letter,” not upon “shaken, troubled.” The word for “is at hand” implies a very close proximity indeed, the participle, in fact (like our word “instant”), being used for “present,” e.g., Galatians 1:4. Probably the form which the false doctrine at Thessalonica was beginning to take was that the day of the Lord had already set in, thus confusing the whole idea of a personal, visible Advent, just as, at a later period, Hymenæus and Philetus confused the true doctrine of resurrection by affirming that it was already past (2 Timothy 2:18). St. Paul not only denies vigorously that the day is come, but proceeds in the next verse to show that the signs of its approach are not yet exhibited. The best reading gives “the day of the Lord,” not “of Christ.” (See Note on 1 Thessalonians 5:2.)