Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
1 John 3:12
Not as Cain, who 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 4:21
And this commandment have we from him, That he who loveth God love his brother also.
1 John 5:5
Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?