Galatians 6:3

If anyone imagines he is somebody, he is deceiving himself, for he is nobody;

1 Corinthians 3:18

Let no one deceive himself about this; whoever of you imagines he is wise with this world's wisdom must become a 'fool,' if he is really to be wise.

2 Corinthians 12:11

Now this is playing the fool! But you forced me to it, instead of coming forward yourselves and vouching for me. That was what I deserved; for, 'nobody' as I am, I am not one whit inferior to these precious 'apostles.'

Romans 12:3

In virtue of my office, I tell everyone of your number who is self-important, that he is not to think more of himself than he ought to think; he must take a sane view of himself, corresponding to the degree of faith which God has assigned to each.

1 Corinthians 8:2

Whoever imagines he has attained to some degree of knowledge, does not possess the true knowledge yet;

Galatians 2:6

Besides, the so-called 'authorities' (it makes no difference to me what their status used to be ??God pays no regard to the externals of men), these 'authorities' had no additions to make to my gospel.

Luke 18:11

The Pharisee stood up and prayed by himself as follows; 'I thank thee, O God, I am not like the rest of men, thieves, rogues, and immoral, or even like yon taxgatherer.

Romans 12:16

Keep in harmony with one another; instead of being ambitious, associate with humble folk; never be self-conceited.

1 Corinthians 13:2

I may prophesy, fathom all mysteries and secret lore, I may have such absolute faith that I can move hills from their place, but if I have no love, I count for nothing;

2 Corinthians 3:5

It is not that I am personally qualified to form any judgment by myself; my qualifications come from God,

2 Timothy 3:13

Bad characters and impostors will go from bad to worse, deceiving others and deceived themselves;

James 1:22

Act on the Word, instead of merely listening to it and deluding yourselves.

James 1:26

Whoever considers he is religious, and does not bridle his tongue, but deceives his own heart, his religion is futile.

1 John 1:8

If we say, 'We are not guilty,' we are deceiving ourselves and the truth is not in us;

Treasury of Scripture Knowledge

Summary

For if a man think himself to be something, when he is nothing, he deceiveth himself.

General references

Bible References

If

Galatians 2:6
Besides, the so-called 'authorities' (it makes no difference to me what their status used to be ??God pays no regard to the externals of men), these 'authorities' had no additions to make to my gospel.
Luke 18:11
The Pharisee stood up and prayed by himself as follows; 'I thank thee, O God, I am not like the rest of men, thieves, rogues, and immoral, or even like yon taxgatherer.
Romans 12:3
In virtue of my office, I tell everyone of your number who is self-important, that he is not to think more of himself than he ought to think; he must take a sane view of himself, corresponding to the degree of faith which God has assigned to each.
1 Corinthians 3:18
Let no one deceive himself about this; whoever of you imagines he is wise with this world's wisdom must become a 'fool,' if he is really to be wise.
1 Corinthians 8:2
Whoever imagines he has attained to some degree of knowledge, does not possess the true knowledge yet;

When

1 Corinthians 13:2
I may prophesy, fathom all mysteries and secret lore, I may have such absolute faith that I can move hills from their place, but if I have no love, I count for nothing;
2 Corinthians 3:5
It is not that I am personally qualified to form any judgment by myself; my qualifications come from God,
2 Corinthians 12:11
Now this is playing the fool! But you forced me to it, instead of coming forward yourselves and vouching for me. That was what I deserved; for, 'nobody' as I am, I am not one whit inferior to these precious 'apostles.'

He deceiveth

1 Corinthians 3:18
Let no one deceive himself about this; whoever of you imagines he is wise with this world's wisdom must become a 'fool,' if he is really to be wise.
2 Timothy 3:13
Bad characters and impostors will go from bad to worse, deceiving others and deceived themselves;
James 1:22
Act on the Word, instead of merely listening to it and deluding yourselves.
1 John 1:8
If we say, 'We are not guilty,' we are deceiving ourselves and the truth is not in us;

General references

1 Corinthians 3:7
So neither planter nor waterer counts, but God alone who makes the seed grow.