2 Corinthians 4:6; 2 Corinthians 6:14; 2 Corinthians 11:14

6 For God, who said, "Light shall shine out of darkness," is the One who has shone in our hearts to give the Light of the knowledge of the glory of God in the face of Christ.
14 Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness?
14 No wonder, for even Satan disguises himself as an angel of light.