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.
Nor by letter — Either the former one which he had sent, some passages of which have been misconceived and misconstrued; or by any other letter, as from us - pretending to have been written by us, the apostles, containing predictions of this kind. There is a diversity of opinion among critics concerning this last clause, some supposing that it refers simply to the first epistle; others supposing that a forged epistle is intended. I have joined the two senses.