Matthew 5:14

Ye are the light of the world. A city sitting on a mountain is unable to be hidden.

John 8:12

Then Jesus again spoke to them, saying, I am the light of the world: the one following me can not walk in darkness, but shall have the light of the life.

John 12:36

While you have the light, believe in the light, in order that you may be the sons of light. And Jesus spoke these things, and having gone out was hidden from them.

Philippians 2:15

in order that you may be blameless and pure, the children of God, irreproachable, amid a crooked and perverse generation, among whom you shine as lights in the world,

John 5:35

He was a bright and shining light: and you were willing to rejoice for an hour in that light.

Romans 2:19-20

and persuade yourself that you are a guide of the blind, a light of those who are in darkness, an instructor of the ignorant,

2 Corinthians 6:14

Be not unequally yoked together with unbelievers: for what participation is there to righteousness and unrighteousness? or what fellowship has light unto darkness?

Ephesians 5:8-14

For at one time ye were darkness, but now ye are light in the Lord: walk about as children of the light,

1 Thessalonians 5:5

for you are all the sons of light, and the sons of day: we are not of night, nor of darkness;

Revelation 1:20-1

and the mystery of the seven stars which you saw in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven golden candlesticks are the seven churches.

Revelation 21:14-27

And the wall of the city having twelve foundations, and on them the twelve names of the twelve apostles of the Lamb.

Treasury of Scripture Knowledge

Summary

Ye are the light of the world. A city that is set on an hill cannot be hid.

Bible References

The light

John 5:35
He was a bright and shining light: and you were willing to rejoice for an hour in that light.
John 12:36
While you have the light, believe in the light, in order that you may be the sons of light. And Jesus spoke these things, and having gone out was hidden from them.
Romans 2:19
and persuade yourself that you are a guide of the blind, a light of those who are in darkness, an instructor of the ignorant,
2 Corinthians 6:14
Be not unequally yoked together with unbelievers: for what participation is there to righteousness and unrighteousness? or what fellowship has light unto darkness?
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,
Philippians 2:15
in order that you may be blameless and pure, the children of God, irreproachable, amid a crooked and perverse generation, among whom you shine as lights in the world,
1 Thessalonians 5:5
for you are all the sons of light, and the sons of day: we are not of night, nor of darkness;
Revelation 1:20
and the mystery of the seven stars which you saw in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven golden candlesticks are the seven churches.
Revelation 2:1
To the angel who is in the church at Ephesus write; The one holding the seven stars in his right hand, the one walking about in the midst of the golden candlesticks, says these things;

A city

Revelation 21:14
And the wall of the city having twelve foundations, and on them the twelve names of the twelve apostles of the Lamb.