2 John 1: 9 Anyone who runs ahead and does not continue in the teaching of Christ does not have God; whoever continues in the teaching has both the Father and the Son.
John 8: 31-32 Jesus then said to those Jews who believed in him, “If you remain in my word, you will truly be my disciples,  and you will know the truth, and the truth will set you free.”
Ephesians 3:9-11 And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:  To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God,  According to the eternal purpose which he purposed in Christ Jesus our Lord:
Matthew 18:15-17 “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.  But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’  If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector.