not to be easily disconcerted or alarmed by any spirit or message or letter seeming to be from us, alleging that the Day of the Lord has already come.
2 That ye be not soon shaken in judgment. He employs the term judgment to denote that settled faith which rests on sound doctrine. Now, by means of that fancy which he rejects, they would have been carried away as it were into ecstasy. He notices, also, three kinds of imposture, as to which they must be on their guard — spirit, word, and spurious epistle.
From these words it appears that some among the Thessalonians had mistaken the apostle's meaning, in what he had written in his former epistle about the coming of Christ, by thinking that it was near at hand, - that Christ was just ready to appear and come to judgment.
Commenting on 2 Thessalonians 2:1-2
That ye be not soon shaken in mind,.... Or "from your mind or sense", as the Vulgate Latin version; or "from the solidity of sense", as the Arabic version; that is, from what they had received in their minds, and was their sense and judgment, and which they had embraced as articles of faith; that they would not be like a wave of the sea...