The people walking in darkness have seen a great light; a light has dawned on those living in the land of darkness. (Isaiah 9:2)

to shine on those who live in darkness and the shadow of death, to guide our feet into the way of peace. (Luke 1:79)

In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. All things were created through him, and apart from him not one thing was created that has been created. In him was life, and that life was the light of men. That light shines in the darkness, and yet the darkness did not overcome it. There was a man sent from God whose name was John. He came as a witness to testify about the light, so that all might believe through him. He was not the light, but he came to testify about the light. The true light that gives light to everyone was coming into the world. (John 1:1-9)

Jesus spoke to them again: “I am the light of the world. Anyone who follows me will never walk in the darkness but will have the light of life.” (John 8:12)