Blessed is the people that know the joyful sound: they shall walk, O LORD, in the light of thy countenance.
The people that walked in darkness have seen a great light: they that dwell in the land of the shadow of death, upon them hath the light shined.
Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.
For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light:
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.