Luke 11:34

The lamp of the body is thine eye. When thine eye is clear, thy whole body also is in the light; but when it is disordered, thy body also is in darkness.

Matthew 6:22-23

The eye is the lamp of the body. If thine eye he clear, thy whole body will be in light;

Mark 4:12

hat seeing they may see, and not perceive, and hearing they may hear, and not understand; lest they should turn, and be forgiven.

Mark 7:22

thefts, murders, adulteries, covetousness, iniquities, deceit, wantonness, an evil eye, blasphemy, pride, foolishness.

Mark 8:18

Having eyes, do ye not see? and having ears, do ye not hear? And do ye not remember,

Acts 2:46

And attending daily with one accord in the temple, and breaking bread in a private house, they partook of their food with gladness and singleness of heart,

Acts 13:11

And now, behold, the hand of the Lord is upon thee, and thou wilt be blind, not seeing the sun for a season. And immediately there fell on him a mist and darkness; and going about he sought to find some who would lead him by the hand.

Acts 26:18

to open their eyes that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness of sins, and an inheritance among the sanctified, by faith in me.

Romans 11:8-10

as it is written: "God gave them a spirit of slumber, eyes that were not to see, and ears that were not to hear, unto this day."

2 Corinthians 1:12

For our glorying is this, the testimony of our conscience, that in simplicity and the sincerity which is of God, not in fleshly wisdom, but in the grace of God, we have conducted ourselves in the world, and especially toward you.

2 Corinthians 4:4

in whom the God of this world blinded the understandings of the unbelieving, so that they cannot behold the light of the gospel of the glory of Christ, who is the image of God.

2 Corinthians 11:3

but I fear, lest by any means, as the serpent beguiled Eve by his subtlety, so your minds should be corrupted from singleheartedness toward Christ.

Ephesians 1:17

that the God of our Lord Jesus Christ, the Father of glory, would give to you the spirit of wisdom and revelation in the full knowledge of him;

Ephesians 6:5

Bondservants, obey your masters according to the flesh, with fear and trembling, in singleness of your heart, as serving Christ;

Colossians 3:22

Bondservants, obey in all things your masters according to the flesh, not with eyeservice, as menpleasers, but in singleness of heart, fearing the Lord.

2 Thessalonians 2:9-12

[he,] whose coming is after the working of Satan with all power, and signs, and wonders of falsehood,

Treasury of Scripture Knowledge

Summary

The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.

Bible References

Light of

Matthew 6:22
The eye is the lamp of the body. If thine eye he clear, thy whole body will be in light;
Mark 8:18
Having eyes, do ye not see? and having ears, do ye not hear? And do ye not remember,
Acts 26:18
to open their eyes that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness of sins, and an inheritance among the sanctified, by faith in me.
Ephesians 1:17
that the God of our Lord Jesus Christ, the Father of glory, would give to you the spirit of wisdom and revelation in the full knowledge of him;

Single

Acts 2:46
And attending daily with one accord in the temple, and breaking bread in a private house, they partook of their food with gladness and singleness of heart,
2 Corinthians 1:12
For our glorying is this, the testimony of our conscience, that in simplicity and the sincerity which is of God, not in fleshly wisdom, but in the grace of God, we have conducted ourselves in the world, and especially toward you.
2 Corinthians 11:3
but I fear, lest by any means, as the serpent beguiled Eve by his subtlety, so your minds should be corrupted from singleheartedness toward Christ.
Ephesians 6:5
Bondservants, obey your masters according to the flesh, with fear and trembling, in singleness of your heart, as serving Christ;
Colossians 3:22
Bondservants, obey in all things your masters according to the flesh, not with eyeservice, as menpleasers, but in singleness of heart, fearing the Lord.

But

Mark 4:12
hat seeing they may see, and not perceive, and hearing they may hear, and not understand; lest they should turn, and be forgiven.
Mark 7:22
thefts, murders, adulteries, covetousness, iniquities, deceit, wantonness, an evil eye, blasphemy, pride, foolishness.
Acts 13:11
And now, behold, the hand of the Lord is upon thee, and thou wilt be blind, not seeing the sun for a season. And immediately there fell on him a mist and darkness; and going about he sought to find some who would lead him by the hand.
Romans 11:8
as it is written: "God gave them a spirit of slumber, eyes that were not to see, and ears that were not to hear, unto this day."
2 Corinthians 4:4
in whom the God of this world blinded the understandings of the unbelieving, so that they cannot behold the light of the gospel of the glory of Christ, who is the image of God.
2 Thessalonians 2:9
[he,] whose coming is after the working of Satan with all power, and signs, and wonders of falsehood,