Galatians 6:1-3

Brothers and sisters, if someone is caught in a sin, you who live by the Spirit should restore that person gently. But watch yourselves, or you also may be tempted. Carry each other's burdens, and in this way you will fulfill the law of Christ. If anyone thinks they are something when they are not, they deceive themselves. 

if someone is caught in a sin, you who live by the Spirit 
1 Corinthians 2:15-16  The person with the Spirit makes judgments about all things, but such a person is subject to merely human judgments, for "Who has known the mind of the Lord so as to instruct him?" [Isaiah 40:13] But we have the mind of Christ.
1 Corinthians 3:1  Brothers and sisters, I could not address you as people who live by the Spirit but as people who are still worldly--mere infants in Christ.

should restore that person gently 
Matthew 18:15  "If your brother or sister sins, go and point out their fault, just between the two of you. If they listen to you, you have won them over."
2 Corinthians 2:7  Now instead, you ought to forgive and comfort him, so that he will not be overwhelmed by excessive sorrow.

Carry each other's burdens, and in this way you will fulfill the law of Christ 
1 Corinthians 9:21  To those not having the law I became like one not having the law (though I am not free from God's law but am under Christ's law), so as to win those not having the law. 
James 2:8  If you really keep the royal law found in Scripture, "Love your neighbor as yourself," [Leviticus 19:18] you are doing right.

If anyone thinks they are something when they are not 
Romans 12:3  For by the grace given me I say to everyone of you: Do not think of yourself more highly than you ought, but rather think of yourself with sober judgment, in accordance with the faith God has distributed to each of you.
1 Corinthians 8:2  Those who think they know something do not yet know as they ought to know.

they deceive themselves 
1 Corinthians 3:18-20  Do not deceive yourselves. If any of you think you are wise by the standards of this age, you should become "fools" so that you may become wise. For the wisdom of this world is foolishness in God's sight. As it is written: "He catches the wise in their craftiness" [Job 5:13]; and again, "The Lord knows that the thoughts of the wise are futile." [Psalm 94:11]

[brackets are mine]

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
Limited to 15 verses per post.