Matthew 6:23
but if your eye be bad, your whole body will be dark: if therefore that, which should be light to you, be dark; how great is that darkness?
Luke 11:34-35
the eye is the light of the body: if therefore your eye be clear, every member of your body will have the benefit of the light: but if it be spoil'd, they must all rest in darkness.
Ephesians 5:8
you were heretofore altogether in the dark, but now being enlightned by the Lord, behave as children of light:
Treasury of Scripture Knowledge
Summary
Then I saw that wisdom excelleth folly, as far as light excelleth darkness.
Bible References
Light
Matthew 6:23
but if your eye be bad, your whole body will be dark: if therefore that, which should be light to you, be dark; how great is that darkness?
Luke 11:34
the eye is the light of the body: if therefore your eye be clear, every member of your body will have the benefit of the light: but if it be spoil'd, they must all rest in darkness.
Ephesians 5:8
you were heretofore altogether in the dark, but now being enlightned by the Lord, behave as children of light: