1 John 1:5-7 (KJV) 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. If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth: But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
Facts are stubborn things. They are what they are and no matter how much we may try to escape from it, we'll never be able to change what the truth is. No matter how many lies we tell or how much we may try to ignore it, the truth will always be the truth and it cannot be changed to suit our convenience.
It's easy to tell others that you're in fellowship with God or that you're enjoying a strong relationship with Him, but is that really the case? Is such a statement true? It doesn't matter who we've fooled on this earth. If we're walking in darkness, then the fact of the matter is that we're not in proper fellowship with God. That is a fact that will never change no matter what we tell others and ourselves.
The world is darkness and does not agree with God on anything. If we're beholden to the world, then our priorities and thought process will be counter to God's direction for our life. You can't be in step with God if you're at odds with Him. Regardless of what we think or act like, we know in our hearts and minds whether we're really true to God or not.
It's also important to realize that God didn't inspire John to pen these verses so that we could use them to measure everyone else's spirituality. God doesn't call Christians to go out and be 'Fruit Inspectors'-- that is, to judge the fruit of other people's lives and determine how good a Christian they are. These verses were given so that we could examine our own life first and foremost.
Why not spend some time in Bible study and prayer today? Confess to God any areas of your life that are keeping you from proper fellowship. Then you can take steps to get yourself right with God and to make your fellowship what it should be. The joy of the Christian life comes from our fellowship with God-- don't let yours slip away.