Matthew 6:23
If thine eye may be bad, thy whole body will be dark. Then if the light which is in you is darkness, the darkness is so great.
Luke 11:34-35
The light of the body is the eye: therefore when thine eye may be clear, truly thy whole body is lighted; but when it may be had, truly thy body is dark.
Ephesians 5:8
For at one time ye were darkness, but now ye are light in the Lord: walk about as children of the 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
If thine eye may be bad, thy whole body will be dark. Then if the light which is in you is darkness, the darkness is so great.
Luke 11:34
The light of the body is the eye: therefore when thine eye may be clear, truly thy whole body is lighted; but when it may be had, truly thy body is dark.
Ephesians 5:8
For at one time ye were darkness, but now ye are light in the Lord: walk about as children of the light,