Such people claim to know God, but their actions prove they really don't. They are disgusting. They won't obey God, and they are too worthless to do anything good.
Your father is the devil, and you do exactly what he wants. He has always been a murderer and a liar. There is nothing truthful about him. He speaks on his own, and everything he says is a lie. Not only is he a liar himself, but he is also the father of all lies.
and people who stay one in their hearts with him won't keep on sinning. If they do keep on sinning, they don't know Christ, and they have never seen him.
My dear friends, we must love each other. Love comes from God, and when we love each other, it shows we have been given new life. We are now God's children, and we know him.