What was the nature of the conversation between the two brothers? Many people have tried to reconstruct what was said between them and some suggest it was a very unpleasant conversation culminating in violence. But the suddenness of the event suggests that this was an act of great cunning, and that Cain talked peaceably with his brother.
Christ said to his disciples, ‘If the world hate you, ye know that it hated me before it hated you. If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you’ (John 15:18-19). That hatred is not simply a matter of two individuals who have fallen out with each other. It is deeper than that. Christ says it is the hatred of the world and not just of individuals in the world. There is an enmity between the unbeliever and the believer which goes beyond any particular incidents that take place in their lives. It results from the great difference between them which God has made as a result of his work in the believer’s heart. It results from the fact that one has faith and the other does not have faith. ‘Cain’, John tells us, ‘was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother’s righteous’ (1 John 3:12).