What are these Words According to the Scriptures?

It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.

John 6:63

For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak. And I know that his commandment is life everlasting: whatsoever I speak therefore, even as the Father said unto me, so I speak.

John 12:49-50

In the Great Controversy we find an exhortation by the writer to study the Bible. She says: 

The Bible was designed to be a guide to all who wish to become acquainted with the will of their Maker. God gave to men the sure word of Prophecy; angels and even Christ Himself came to make known to Daniel and John the things that must shortly come to pass. Those important matters that concern our salvation were not left involved in mystery… the word of God is plain to all who study it with a prayerful heart… and no church can advance in holiness unless its members are earnestly seeking for truth as for hid treasure.

And the Father Himself in Deuteronomy as He speaks to Moses says He will put His words in Jesus’ mouth. Even the disciples understood that Jesus was the prophet Moses had written about. 

And Peter answers Christ saying:

…thou hast the words of eternal life. And we believe and are sure that thou art that Christ, the Son of the living God.

The Book of Revelation starts with this truth as its foundation.