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.

 It is further to be noted that what John is speaking about is a man's attitude to his brother, that is, to the man next door, the man beside whom he lives and works, the man with whom he comes into contact every day. There is a kind of Christian attitude which enthusiastically preaches love to people in other lands, but has never sought any kind of fellowship with its next door neighbour or even managed to live at peace within its own family circle. John insists on love for the man with whom we are in daily contact. As A. E. Brooke puts it, this is not "vapid philosophy, or a pretentious cosmopolitanism"; it is immediate and practical. 