1 John 1:7
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.
If we walk in the “light”, we can have fellowship with Christ and other believers. Every individual on the earth is either in darkness or light. Those who are in darkness are without Christ, while those in the light, have Christ. Those in darkness, have not been cleansed by the blood of Christ, while those in the light, have been cleansed from all sin by the blood of Jesus Christ.