1st John 2:18-27 A SENSE OF URGENCY Fellowship is essential between each of us and our God as well as fellowship with the people of God. Not everyone who takes the place of being a Christian is one in the scriptural sense. True fellowship relies on the advocacy of Christ and the obedience of each believer. When these are understood, there is love for the brethren that involves the privilege of fellowship with believers of all ages. Love for the world on the part of any of God's children limits or brings to an end that fellowship that was once enjoyed. There is another necessity for fellowship to be maintained, and that is a commitment to the doctrine of Christ.
The fact that John addresses this matter of false teachers pretending to be Christians in order to get a following for themselves, and tells them this is the "last hour," makes this an urgent matter. When the word "last" is used as in "last times," "last days" and "last hour," the point is made that something is imminent. In this case it is the Lord's coming. "The last days" ("last hour") refers to a limited time, a comparatively brief time to do what needs to be done between the first and second coming of Christ. In the final exhortation in this passage to the "dear children," "fathers" and "young men," a sense of urgency is given. He affirms the fact of the time in which they were living, and believers are earnestly looking for the Lord to come. They had heard from the apostles that antichrist would come, and so substantiates that by exposing those who were false among them.