Part of finding Jesus in the OT is noting the way in which his approach to God’s law reflects that found in the OT. Notice what’s happening in these verses quoted by Chris Wright (taken from Psalm 119:57-64):
You are my portion, O LORD; I have promised to obey your words.
I have sought your face with all my heart; be gracious to me according to your promise.
I have considered my ways and have turned my steps to your statutes.
I will hasten and not delay to obey your commands.
The earth is filled with your love, O LORD; teach me your decrees.
“[T]he Psalmist interweaves his wonder at the promise, the grace, the goodness, love and salvation of God with his determination to live according to God’s law. He delights in the law because it enables him to please the God he loves.
There is much in the life and teaching of Jesus which reflects the ethos of Psalm 119 – a Psalm which rejoices in the law, but rejoices more in the richness of relationship with God himself which is then expressed through diligent obedience.”
Christopher J. H. Wright, Knowing Jesus through the Old Testament, 194-5.