He who sins is of the devil, for the devil has been sinning from the beginning. To this end the Son of God was revealed, that he might destroy the works of the devil.

 Into the human heart there are bound to come doubts. Any man with a sensitive mind and heart must sometimes wonder if he really is a Christian at all. John's test is quite simple and far-reaching. It is love. If we feel love for our fellow-men welling up within our hearts, we can be sure that the heart of Christ is in us. John would have said that a so-called heretic whose heart was overflowing with love and whose life was beautiful with service, was far nearer Christ than someone who was impeccably orthodox, yet cold and remote from the needs of others. 