Adherence to the Law

Matt.5:17 "Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. 18 I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished. 19 Anyone who breaks one of the least of these commandments and teaches others to do the same will be called least in the kingdom of heaven, but whoever practices and teaches these commands will be called great in the kingdom of heaven. 20 For I tell you that unless your righteousness surpasses that of the Pharisees and the teachers of the law, you will certainly not enter the kingdom of heaven."

"There is no fulfillment of the law apart from communion with God, and no communion with God apart from fulfilment of the law. To forget the first condition was the mistake of the Jews, and to forget the second the temptation of the disciples...
But the disciple had the advantage over the Pharisee in that his doing of the law is in fact perfect. How is that possible? Because between the disciples and the law stands one who has perfectly fulfilled it, one with whom they live in communion. They are faced not with a law which has never yet been fulfilled, but with one whose demands have already been satisfied. The righteousness it demands is already there, the righteousness of Jesus which submits to the cross because that is what the law demands. This righteousness is therefore not a duty owed, but a perfect and truly personal communion with God, and Jesus not only possesses this righteousness, but is himself the personal embodiment of it. He is the righteousness of the disciples. By calling them he has admitted them to partnership with himself, and made them partakers of his righteousness in its fullness...
This is where the righteousness of the disciple exceeds that of the Pharisees; it is grounded solely upon the call to fellowship with him alone who fulfils the law. Their righteousness is righteousness indeed, for from henceforth they do the will of God and fulfil the law themselves." ~D. Bonhoeffer, Ch.8 - The Righteousness of Christ, The Cost of Discipleship

“… the secret of the gospel is that we actually do more when we hear less about all we need to do for God and hear more about all that God has already done for us.” ~ Kevin DeYoung, DeYoung, Restless, and Reformed