Galatians 6:3

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

1 Corinthians 3:18

Let no one deceive himself; if any one thinketh himself wise among you in this world, let him become a fool, that he may become wise.

2 Corinthians 12:11

I have become a fool; it is ye that compelled me. For I ought to have been commended by you; for in nothing was I behind the very foremost apostles, though I am nothing.

Romans 12:3

For through the grace given to me I warn every one among you, not to think of himself more highly than he ought to think, but to think soberly, according to the measure of faith which God hath imparted to each.

1 Corinthians 8:2

if any one think that he knoweth anything, he knoweth nothing yet, as he ought to know;

Galatians 2:6

But from those who were reputed to be somewhatwhatever they were, it matters not to me, (God accepteth no mans person,) for to me those in reputation communicated nothing new.

Galatians 2:6

But from those who were reputed to be somewhatwhatever they were, it matters not to me, (God accepteth no mans person,) for to me those in reputation communicated nothing new.

Galatians 2:6

But from those who were reputed to be somewhatwhatever they were, it matters not to me, (God accepteth no mans person,) for to me those in reputation communicated nothing new.

Luke 18:11

The Pharisee stood and prayed by himself thus: O God, I thank thee that I am not as the rest of men, extortioners, unjust, adulterers, or even as this publican.

Romans 12:16

Be of one mind among yourselves. Set not your minds on high things, but content yourselves with what is humble. Be not wise in your own conceits.

1 Corinthians 13:2

And though I have the gift of prophecy, and understand all mysteries and all knowledge, and though I have all faith, so as to remove mountains, and have not love, I am nothing.

2 Corinthians 3:5

not that we are able of ourselves to think anything, as from ourselves; but our ability is from God;

2 Timothy 3:13

But evil men and impostors will wax worse and worse, deceiving and being deceived.

James 1:22

But be doers of the word, and not hearers only, deceiving yourselves.

James 1:26

If any one thinks that he is religious, and bridles not his tongue, but deceives his own heart, this mans religion is vain.

1 John 1:8

If we say that we have no sin, we deceive 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
But from those who were reputed to be somewhatwhatever they were, it matters not to me, (God accepteth no mans person,) for to me those in reputation communicated nothing new.
Luke 18:11
The Pharisee stood and prayed by himself thus: O God, I thank thee that I am not as the rest of men, extortioners, unjust, adulterers, or even as this publican.
Romans 12:3
For through the grace given to me I warn every one among you, not to think of himself more highly than he ought to think, but to think soberly, according to the measure of faith which God hath imparted to each.
1 Corinthians 3:18
Let no one deceive himself; if any one thinketh himself wise among you in this world, let him become a fool, that he may become wise.
1 Corinthians 8:2
if any one think that he knoweth anything, he knoweth nothing yet, as he ought to know;

When

1 Corinthians 13:2
And though I have the gift of prophecy, and understand all mysteries and all knowledge, and though I have all faith, so as to remove mountains, and have not love, I am nothing.
2 Corinthians 3:5
not that we are able of ourselves to think anything, as from ourselves; but our ability is from God;
2 Corinthians 12:11
I have become a fool; it is ye that compelled me. For I ought to have been commended by you; for in nothing was I behind the very foremost apostles, though I am nothing.

He deceiveth

1 Corinthians 3:18
Let no one deceive himself; if any one thinketh himself wise among you in this world, let him become a fool, that he may become wise.
2 Timothy 3:13
But evil men and impostors will wax worse and worse, deceiving and being deceived.
James 1:22
But be doers of the word, and not hearers only, deceiving yourselves.
1 John 1:8
If we say that we have no sin, we deceive ourselves, and the truth is not in us.

General references

1 Corinthians 3:7
So then, neither he that planteth nor he that watereth is anything, but God that giveth the growth.