How can the light that is in us become darkness?  The Lord Jesus in Luke 11:33 through 36 spoke about man's conscience- that is his light.  But He also told us that such a light can become darkness.  And then what?  How about the dark spots on our conscience?  Is it possible for a Christian to have dark spots in his life?  What are they?  How can they be lightened?  Jesus desires His light to fill our hearts without any darkness.  It is possible.  This study will help you find out and realize it in and through the enablement of the Holy Spirit.