Luke 11:34

Your eye is [like] a lamp to your body [i.e., your life]. When your eye sees things correctly, [then] your whole body [i.e., your entire life] is illuminated [i.e., directed into proper conduct]. But when it sees things wrongly, [then] your body [i.e., your life] is also full of darkness [i.e., is not being lived properly].

Matthew 6:22-23

Your eye is [like] a lamp to your body [i.e., your life]. If your eye sees things correctly, [then] your whole body [i.e., your entire life] will be illuminated [i.e., be directed into proper conduct].

Mark 4:12

This is so that even though they see, they will see and yet not perceive. And even though they hear, they will hear and yet not understand. For if they did, they would turn [back to God] again and receive forgiveness."

Mark 7:22

greedy desires, wickedness, deceit, unrestrained indecency, envy, slander, arrogance and foolishness.

Mark 8:18

Even though you have eyes, do you not see? And even though you have ears, do you not hear? And do you not remember?

Acts 2:46

And every day they continued to meet together in the Temple [i.e., for teaching and worship]. They were enjoying their meals and the close fellowship they shared in the various homes, and were

Acts 13:11

Now look, the power of the Lord is coming on you to cause [such] blindness that you will not [even] be able to see the sun for awhile." And immediately a misty darkness fell on him and he kept trying to find people to lead him [around] by the hand.

Acts 26:18

to open their eyes [to the truth] so they will turn from darkness to light and from the power [i.e., the influence] of Satan to God. [Then] they can receive the forgiveness of sins and the inheritance [of never ending life], along with [all] those who are set apart [for God] by trusting in Me.'

Romans 11:8-10

as it has been written [Isa. 19:10], "God gave them a spirit of numbness [i.e., they developed a spiritual insensitivity to God and His word]. [He gave them] eyes to see with [but they would not look], and ears to hear with [but they did not listen]. And they still have this spirit."

2 Corinthians 1:12

For this is what we boast of: Our conscience testifies that we have conducted ourselves in the world, and especially toward you, in holiness and godly sincerity, not with human wisdom, but with the favor of God.

2 Corinthians 4:4

For the god of this world [i.e., Satan] has blinded the minds of the unbelievers, so that they would not see the light of the Gospel of the splendor of Christ, who is the image of God.

2 Corinthians 11:3

But I am afraid that somehow, just as the snake tricked Eve by his cunning, your minds might [also] be led astray from your sincere and pure devotion to Christ.

Ephesians 1:17

that the God of our Lord Jesus Christ, the glorious Father, will give you a spirit [i.e., a disposition] of wisdom and revelation [or, "give you the spiritual gifts of wisdom and revelation"], so you can have full knowledge of God.

Ephesians 6:5

Slaves, you should obey those who are your earthly masters, out of reverence and eagerness to please them, with a sincere heart, as you would [obey] Christ.

Colossians 3:22

You slaves should obey your earthly masters in everything, [and] do not do it just when they are looking [at you], or to gain their favor, but do it with a sincere heart, out of reverence for the Lord.

2 Thessalonians 2:9-12

The coming [of this lawless person] is according to the work of Satan, [and will be] attended by all kinds of powerful [i.e., miraculous] signs and false 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
Your eye is [like] a lamp to your body [i.e., your life]. If your eye sees things correctly, [then] your whole body [i.e., your entire life] will be illuminated [i.e., be directed into proper conduct].
Mark 8:18
Even though you have eyes, do you not see? And even though you have ears, do you not hear? And do you not remember?
Acts 26:18
to open their eyes [to the truth] so they will turn from darkness to light and from the power [i.e., the influence] of Satan to God. [Then] they can receive the forgiveness of sins and the inheritance [of never ending life], along with [all] those who are set apart [for God] by trusting in Me.'
Ephesians 1:17
that the God of our Lord Jesus Christ, the glorious Father, will give you a spirit [i.e., a disposition] of wisdom and revelation [or, "give you the spiritual gifts of wisdom and revelation"], so you can have full knowledge of God.

Single

Acts 2:46
And every day they continued to meet together in the Temple [i.e., for teaching and worship]. They were enjoying their meals and the close fellowship they shared in the various homes, and were
2 Corinthians 1:12
For this is what we boast of: Our conscience testifies that we have conducted ourselves in the world, and especially toward you, in holiness and godly sincerity, not with human wisdom, but with the favor of God.
2 Corinthians 11:3
But I am afraid that somehow, just as the snake tricked Eve by his cunning, your minds might [also] be led astray from your sincere and pure devotion to Christ.
Ephesians 6:5
Slaves, you should obey those who are your earthly masters, out of reverence and eagerness to please them, with a sincere heart, as you would [obey] Christ.
Colossians 3:22
You slaves should obey your earthly masters in everything, [and] do not do it just when they are looking [at you], or to gain their favor, but do it with a sincere heart, out of reverence for the Lord.

But

Mark 4:12
This is so that even though they see, they will see and yet not perceive. And even though they hear, they will hear and yet not understand. For if they did, they would turn [back to God] again and receive forgiveness."
Mark 7:22
greedy desires, wickedness, deceit, unrestrained indecency, envy, slander, arrogance and foolishness.
Acts 13:11
Now look, the power of the Lord is coming on you to cause [such] blindness that you will not [even] be able to see the sun for awhile." And immediately a misty darkness fell on him and he kept trying to find people to lead him [around] by the hand.
Romans 11:8
as it has been written [Isa. 19:10], "God gave them a spirit of numbness [i.e., they developed a spiritual insensitivity to God and His word]. [He gave them] eyes to see with [but they would not look], and ears to hear with [but they did not listen]. And they still have this spirit."
2 Corinthians 4:4
For the god of this world [i.e., Satan] has blinded the minds of the unbelievers, so that they would not see the light of the Gospel of the splendor of Christ, who is the image of God.
2 Thessalonians 2:9
The coming [of this lawless person] is according to the work of Satan, [and will be] attended by all kinds of powerful [i.e., miraculous] signs and false wonders,