I have written to you, fathers, because you know him who is from the beginning. I have written to you, young men, because you are strong, and the word of God remains in you, and you have overcome the evil one.

 (a) Little children is one of John's favourite expressions. He also uses it in 1 John 2:1; 1 John 2:28; 1 John 3:7; 1 John 4:4; 1 John 5:21; and it is clear in the other cases that he is not thinking of little children in terms of age but of Christians whose spiritual father he is. By this time he must have been very nearly a hundred years old; all the members of his churches were of a far younger generation and to him they were all little children in the same way as a teacher or professor may still think of his boys after the boys have long since become men. 