KJV: That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.
NASB: that you not be quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come.
KJV: And as a vesture shalt thou fold them up, and they shall be changed: but thou art the same, and thy years shall not fail.
NASB: AND LIKE A MANTLE YOU WILL ROLL THEM UP; LIKE A GARMENT THEY WILL ALSO BE CHANGED. BUT YOU ARE THE SAME, AND YOUR YEARS WILL NOT COME TO AN END."