1 John 3:4 Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.

1 john 5:1-3
1Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.

2 By this we know that we love the children of God, when we love God, and keep his commandments.

3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.

The commandments are love, not loving each other (In the biblical context) is sin, anomia, transgression of the Law (Torah)