not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come.
That ye be not soon shaken in mind: The word "soon" (takoes) refers to "quickly, shortly...hastily (Thayer 616-1-50301). "Be shaken" (nous) means "to shake down, overthrow, that is trop. to cast down from one’s (secure and happy) state...to move, agitate the mind to disturb one" (Thayer 567-1-4531). Paul encourages the Thessalonians so they will not be easily confused, mislead, shaken, or unsettled by deceitful teaching about the coming of Jesus Christ. Vincent says that by the phrase "be not soon shaken in mind," that Paul is telling the Thessalonians "to keep their heads" (Vol. IV 62).