Matthew 6:22-23 (NIV)
22“The eye is the lamp of the body. If your eyes are good, your whole body will be full of light.
23But if your eyes are bad, your whole body will be full of darkness. If then the light within you is darkness, how great is that darkness!
Acts 26:18 (NIV)
18to open their eyes and turn them from darkness to light, and from the power of Satan to God, so that they may receive forgiveness of sins and a place among those who are sanctified by faith in me.
Ephesians 1:18 (NIV)
18I pray also that the eyes of your heart may be enlightened in order that you may know the hope to which he has called you, the riches of his glorious inheritance in the saints