Romans 12:16
Have the same [good] thoughts toward one another. Do not [always] be thinking you are a "bigshot," but lower yourself to accept humble tasks [or, humble people]. Do not think you are so smart.
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.
John 9:41
Jesus said to them, "If you were [really] blind [i.e., unable to see spiritually], you would not be guilty of sin. But since you claim, 'We can see [fine],' you remain guilty of sin."
Romans 1:22
They claimed to be wise, but became fools,
Romans 11:25
For I want you to know this secret, brothers, so you will not become conceited: Part of the Israelites have become [spiritually] insensitive [to God], [and will remain that way] until the fullness of the Gentiles occurs. [Note: As with verse 12, concerning the Jews, "fullness" here may mean either a large or the complete number of Gentiles who will be saved].