Luke 11:34

Your eye is the lamp of your body. When your eye is sound, your whole body is light, but when it is unsound, your body is dark.

Matthew 6:22-23

The eye is the lamp of the body. If then your eye is sound, your whole body will be light,

Mark 4:12

so that " 'They may look and look and yet not see, And listen and listen and yet not understand, Lest possibly they should turn and be forgiven.' ",

Mark 7:22

greed, malice, deceit, indecency, envy, abusiveness, arrogance, folly??23 all these evils come from inside, and they pollute a man."

Mark 8:18

When you have eyes can you not see, and when you have ears can you not hear? Do you not remember

Acts 2:46

Day after day they all went regularly to the Temple, they broke their bread together in their homes, and they ate their food with glad and simple hearts,

Acts 13:11

The Lord's hand is right upon you, and you will be blind and unable even to see the sun for a time." Instantly a mist of darkness fell upon him, and he groped about for someone to lead him by the hand.

Acts 26:18

to open their eyes and turn them from darkness to light and from Satan's control to God, so that they may have their sins forgiven and have a place among those who are consecrated through faith in me.'

Romans 11:8-10

The rest became callous; as the Scripture says, "God has thrown them into a state of spiritual insensibility, with eyes that cannot see and cars that cannot hear, that has lasted down to this day."

2 Corinthians 1:12

For my boast is what my conscience tells me, that my relations to the world and still more to you have been marked by pure motives and godly sincerity, not by worldly shrewdness but by the favor of God.

2 Corinthians 4:4

In their case, the god of this world has blinded the minds of the unbelievers, to keep the light of the good news of the glorious Christ, the likeness of God, from dawning upon them.

2 Corinthians 11:3

But I am afraid that just as the serpent by his cunning deceived Eve, your thoughts will be led astray from their single-hearted fidelity to Christ.

Ephesians 1:17

The God of our Lord Jesus Christ, the glorious Father, grant you the Spirit of wisdom and revelation through the knowledge of himself,

Ephesians 6:5

You who are slaves, obey your earthly masters, in reverence and awe, with sincerity of heart, as you would the Christ,

Colossians 3:22

You who are slaves must always obey your earthly masters, not with mere external service, as though you had only men to please, but with sincerity of heart, because you fear the Lord.

2 Thessalonians 2:9-12

The other's appearance, by the contrivance of Satan, will be full of power and pretended signs and wonders,

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 then your eye is sound, your whole body will be light,
Mark 8:18
When you have eyes can you not see, and when you have ears can you not hear? Do you not remember
Acts 26:18
to open their eyes and turn them from darkness to light and from Satan's control to God, so that they may have their sins forgiven and have a place among those who are consecrated through faith in me.'
Ephesians 1:17
The God of our Lord Jesus Christ, the glorious Father, grant you the Spirit of wisdom and revelation through the knowledge of himself,

Single

Acts 2:46
Day after day they all went regularly to the Temple, they broke their bread together in their homes, and they ate their food with glad and simple hearts,
2 Corinthians 1:12
For my boast is what my conscience tells me, that my relations to the world and still more to you have been marked by pure motives and godly sincerity, not by worldly shrewdness but by the favor of God.
2 Corinthians 11:3
But I am afraid that just as the serpent by his cunning deceived Eve, your thoughts will be led astray from their single-hearted fidelity to Christ.
Ephesians 6:5
You who are slaves, obey your earthly masters, in reverence and awe, with sincerity of heart, as you would the Christ,
Colossians 3:22
You who are slaves must always obey your earthly masters, not with mere external service, as though you had only men to please, but with sincerity of heart, because you fear the Lord.

But

Mark 4:12
so that " 'They may look and look and yet not see, And listen and listen and yet not understand, Lest possibly they should turn and be forgiven.' ",
Mark 7:22
greed, malice, deceit, indecency, envy, abusiveness, arrogance, folly??23 all these evils come from inside, and they pollute a man."
Acts 13:11
The Lord's hand is right upon you, and you will be blind and unable even to see the sun for a time." Instantly a mist of darkness fell upon him, and he groped about for someone to lead him by the hand.
Romans 11:8
The rest became callous; as the Scripture says, "God has thrown them into a state of spiritual insensibility, with eyes that cannot see and cars that cannot hear, that has lasted down to this day."
2 Corinthians 4:4
In their case, the god of this world has blinded the minds of the unbelievers, to keep the light of the good news of the glorious Christ, the likeness of God, from dawning upon them.
2 Thessalonians 2:9
The other's appearance, by the contrivance of Satan, will be full of power and pretended signs and wonders,