The Apostle John

The Apostle John was another prominent one of the twelve apostles. He also wrote about the last days, and the coming of the antichrist. What was his manner of preparing the saints for evil days? He brought before them the manifestation of the true life in the Person of the Son of God on earth. They were cast back upon that which "was from the beginning"—even the revelation of that life on earth, and of the Father and the Son or true Christianity as known from the beginning of it. Nothing was to supplant or improve it. They had all they needed then and ever. If there were false teachers, bringing false doctrine, the saints had the Holy Spirit dwelling in them as the anointing to teach them the difference between truth and error. The Holy Spirit would guide the lambs and sheep so they would only recognize the voice of the true Shepherd and not be misled by wolves in sheep's clothing.
In John's second epistle, when warning a sister against receiving false teachers into her home, he said. "Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God." v. 9. This would be better translated. "He that goes forward and abides not in the doctrine"; that is, to leave the very foundation and add anything to it under the specious plea of progress is not to abide in the doctrine of Christ. It is a fatal delusion.