JESUS CHRIST and the apostles preached that:
The Holy Scripture is the Word of GOD written by the inspiration of GOD, having final authority in all matters that concern men on earth and in the doctrines, activities and administration of the church of CHRIST in the world. The scripture is pure, perfect, powerful, and eternal. Its commandments are binding on all men. Its prophecies never fail. Its promise are dependable. Its central message is JESUS CHRIST and its offer is eternal with GOD. Its life is righteousness and holiness in CHRIST. Its ultimate promise is heaven. Its writers were perfectly inspired by the Holy Spirit. The Holy Scripture, the Bible, is made up of 66 books, beginning with the book of Genesis and ending with the book of Revelation. The Scripture is called the Word Of GOD, or the Word Of CHRIST. Nothing must be added to it and nothing must be subtracted from it. All prophecies and revelations in the church must be authenticated by the scripture.

Matthew 5: 17-20 KJV
17. Think not that I am come to destroy the law, or the prophets: I am not come to destroy: but to fulfill.
18. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
19. Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
20. For I say into you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.

2 Timothy 3:15-17 KJV
15. And that from a child thou hast known the holy Scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.
16. All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17. That the man of God may be perfect, thoroughly furnished unto all good works.