Do we walk in darkness?

It says in 1 John 1:5 (NKJV) "This is the message which we have heard from Him and declare to you, that God is light and in Him is no darkness at all."  There is no darkness in our Heavenly Father at all.  We are instructed as children of God to walk in the light and to be imitators of God himself.  So then why would a child of God walk in the darkness?  When we walk in darkness we do not walk in the light of God's word.  It causes the blessing of God to stop working in our life.  It's just like someone who would come home late at night and not turn the light on in their house.  So in the dark they would grope around and bump into things.  Perhaps that could injure themselves pretty bad.  To the point they might even need medical help.  Such is the believer who refuses to walk in the light of God's word.  They will cause unnecessary damage and impact the blessing of God in their lives.