Historical Christianity

I want to begin a brief but entirely new series of studies of 1 John. And to begin with I want to look at the purpose for which 1 John was written. It is possible to read a book without understanding the purpose for which it was written. Indeed, much reading is done on this level by many persons. But it is not possible to study a book without dealing with this primary question.

The first is the test of practical righteousness in the believer’s life. It does not mean that the Christian must be without sin—indeed, John says that the one professing to be without sin deceives himself and makes God a liar (1:8, 10)—but it does mean that he must be progressing in righteousness so that his profession is increasingly matched by his conduct.

The second purpose that John had in writing his letter is related to the first one, but it is rightly considered a distinct purpose, in that by it John was dealing with a new and dangerous movement in his day and was warning Christians about it. The movement was what today we would call an early form of gnosticism, and John’s objective in writing against it is to stress the historical origins of Christianity.

The third purpose for the writing of 1 John is to explain or elaborate upon Christ’s new commandment: “A new commandment I give unto you, that ye love one another” (John 13:34).

What, then, are the major emphases of John’s first letter for ourselves and our contemporaries? There are five of them.
The first message of John is his insistence upon the truth and value of the old message of the Gospel as opposed to new or modern alterations of it, such as would change its character.