v.5 This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
John is telling us here that God is light and there is no darkness in Him. In the Bible, light is symbolic of purity and darkness is symbolic or evil of sin. Light disposes and dispels darkness!
Jesus is also said that he is light as well. John 1:9 That was the true Light, which lighteth every man that cometh into the world. Jesus was also sinless, therefore without darkness. John 1:4-5 In him was life; and the life was the light of men. (5) And the light shineth in darkness; and the darkness comprehended it not.
No Longer in Darkness
v.6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
Yes, it is true that those who have not accepted Jesus as their Lord still walk in the darkness. Why? – Because they have not come to the light. How about Christians though? - Is it possible for them to walk in darkness? Yes and no.
Yes, it is possible for Christians to take a temporary walk on the dark side. We all have done it, are doing it and probably going to do it again. However, no, it is not possible for Christians to stay in the dark.
I see many people who “say” they are Christians, but their lives are full of darkness (sin). My friend, this is a complete contradiction of Scripture, because to be a Christian means that we no longer walk in the darkness. Jesus said in John 12:46 I am come a light into the world, that whosoever believeth on me should not abide in darkness. And again in John 8:12 Jesus said, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.
Contrary to popular belief, Christians do not continually walk in darkness. Again, If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth.