On the mount of transfiguration Moses and Elijah appeared with Jesus. Moses being the representative of the Law and Elijah the representative of the Prophets yet the voice from the cloud said of Jesus 'this is my Son, listen to him'
God's final word is Jesus bar nothing just as the writer of Hebrews states:-
Hebrews 1:1-3
'In the past God spoke to our ancestors through the prophets at many times and in various ways, 2 but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. 3 The Son is the radiance of God’s glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven.
We choose who the final authority is. If it is the Law and the Prophets, we oppose God's declaration.......if we choose God's revelation of himself in Jesus, a seismic shift occurs in how we see.