In Deuteronomy 5:31-33, Moses wrote down everything that God said without departing from it, so it is the word of God and does not oppose the word of God. All of God's commands were given by God, so they all have the same authority regardless of whether He wrote them down, He told Moses to write them down, or even if He has just spoken them without anyone writing them down. Christ quoted three times from Deuteronomy in order to defeat the temptations of Satan, so he had it memorized and he affirmed its authority. The Torah is God's word and Christ is God's word made flesh, so he embodied God's word by setting a sinless example of how to walk in obedience to the Torah, and as his followers we are told to follow his example (1 Peter 2:21-22) and that those who are in Christ are obligated to walk in the same way he walked (1 John 2:6).
Yes, we walk or understand by faith the power of God as it is written .. . what I refer to as sola scriptura) the bible alone. The one source of Christ's living faith .
Three denoting the end of the matter .Three times the Father in Mathew 4 gave words to Jesus the son of man to rebuke the father of lies .
Joshua 8:31 As Moses the servant of the Lord commanded the children of Israel, as it is written in the book of the law of Moses, an altar of whole stones, over which no man hath lift up any iron: and they offered thereon burnt offerings unto the Lord, and sacrificed peace offerings.