Since God is light and there is no darkness in him, surely, we need to understand what John means by darkness. Darkness in John’s vocabulary is that way of thinking and doing that is contrary to God’s righteous and holy way. In other words, darkness is sin. When I am in darkness, I am in sin. When I am in darkness, I can no longer walk the righteous way toward God because the darkness blocks my path that leads me to God, and, thus, I can’t see it (1 John 2:11).