1st John 1:6-7
Here John is talking to that group who said they were so spiritual they didn’t have to worry about sin. Kind of like Napoleon when he said that laws were for ordinary people – not the likes of him!
When John said that to have fellowship with God who is light, a man must walk in the light and that if he is still walking in the moral and ethical darkness of the Christ-less life – then he can have no fellowship with God, this is really what God said in Leviticus centuries before, “Ye shall be holy; for I the Lord your God am holy.”
If we are committed to fellowship with God, our life must reflect the goodness of God! Obviously this doesn’t mean we have to be perfect, but it means we try and we’re sorry when we fail. It means we never think that sin doesn’t matter. Actually we notice our sins more and they seem worse to us then they did before.
John mentions truth here, and a test for truth is if we have fellowship. Christianity is not exclusive. (Revelation 3:20)
Some translations say, “he who really knows the truth is daily more and more cleansed from sin by the blood of Jesus Christ.” What John means is, if you really understand what the sacrifice of Jesus has done, if you are really experiencing its power day by day, then every day you will become more and more fit to enter the presence of God. So not only did Christ’s sacrifice atone us from the sin of the past, but equips us in holiness day by day.
All of the sacrifices in the Old Testament prepared people to understand Christ’s sacrifice. My application Bible says, “God graciously forgave them because of their faith in Him and because they obeyed His commandments concerning the sacrifice.”
They believed God telling them that life is in the blood and the wages of sin is death. And that God allowed their guilt and sins to be transferred to an animal that was then killed. God told them that and they had faith that what He said was true. And they followed the laws that God laid out concerning sacrifices.
John says any man who denies Jesus, as Christ is a liar. And any man who says he loves God, but at the same time hates his brother is a liar. All of our saying we love God and love Christ means nothing if we hate man.