Luke 11:35

Look therefore [to see] whether or not the light that is in you [i.e., your perspective on things] might [actually] be darkness [i.e., a distorted perspective].

John 7:48-49

Have any of the authorities or Pharisees believed in him?

John 9:39-41

And Jesus said, "I came to this world to judge [it], so that people who can not see [spiritually] will [be able to] see; and those who [think they can] see [spiritually] will become blind."

Romans 1:22

They claimed to be wise, but became fools,

Romans 2:19-23

if you are confident that you can give [spiritual] guidance to blind people and enlightenment to those who are in [spiritual] darkness;

1 Corinthians 1:19-21

For it is written [Isa. 29:14], "I [i.e., God] will destroy the wisdom of wise people, and will set aside [i.e., hinder] the understanding of intelligent people."

1 Corinthians 3:18-20

No one should fool himself. If any person among you thinks he is smart, by human standards, he should become a "fool," so that he can become [really] wise.

James 3:13-17

Who [then] is the wise and understanding person among you? He should show by his good conduct [that he has] deeds of gentleness [stemming] from wisdom.

2 Peter 1:9

But, anyone who lacks these qualities is [spiritually] blind and shortsighted, and has forgotten that he has been cleansed [i.e., forgiven] of his past sins.

2 Peter 2:18

[Although] their talk is big, what they say is worthless, and by [offering people] fleshly desires [i.e., sexual gratification], they lead people astray, who are barely escaping from the error of the world.

Revelation 3:17

For you are saying, 'I am wealthy; I have made plenty of money and do not need anything.' But you do not know that you are [spiritually] wretched and miserable and poor and blind and naked.

Treasury of Scripture Knowledge

Summary

Take heed therefore that the light which is in thee be not darkness.

Bible References

General references

John 7:48
Have any of the authorities or Pharisees believed in him?
John 9:39
And Jesus said, "I came to this world to judge [it], so that people who can not see [spiritually] will [be able to] see; and those who [think they can] see [spiritually] will become blind."
Romans 1:22
They claimed to be wise, but became fools,
Romans 2:19
if you are confident that you can give [spiritual] guidance to blind people and enlightenment to those who are in [spiritual] darkness;
1 Corinthians 1:19
For it is written [Isa. 29:14], "I [i.e., God] will destroy the wisdom of wise people, and will set aside [i.e., hinder] the understanding of intelligent people."
1 Corinthians 3:18
No one should fool himself. If any person among you thinks he is smart, by human standards, he should become a "fool," so that he can become [really] wise.
James 3:13
Who [then] is the wise and understanding person among you? He should show by his good conduct [that he has] deeds of gentleness [stemming] from wisdom.
2 Peter 1:9
But, anyone who lacks these qualities is [spiritually] blind and shortsighted, and has forgotten that he has been cleansed [i.e., forgiven] of his past sins.
2 Peter 2:18
[Although] their talk is big, what they say is worthless, and by [offering people] fleshly desires [i.e., sexual gratification], they lead people astray, who are barely escaping from the error of the world.
Revelation 3:17
For you are saying, 'I am wealthy; I have made plenty of money and do not need anything.' But you do not know that you are [spiritually] wretched and miserable and poor and blind and naked.