On the Sixth Sunday after Trinity, the Gospel begins with Matthew 5:20: "Jesus said unto his disciples, "Except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.'" How can this be? The Pharisees were noted for their pursuit of legal righteousness. How can the disciples of Jesus even hope that their righteousness might exceed that of the Pharisees?
We see the answer in the following verses, Matthew 5:21-26. In these verses and throughout the Sermon on the Mount, it becomes clear that our Lord is talking about more than a mere external obedience to the commandments of divine Law. While obeying certain rules can help restrain evil and provide guidance for good behavior, external obedience is not sufficient. Following the rules is not enough because true righteousness involves inner attitudes. God wants us to turn from sin and be renewed inwardly in faith, hope, and love each day. And such repentance and renewal only come through divine grace manifest in Jesus Christ.
In other words, Matthew 5 refers to the same spiritual renewal discussed in Romans 6:3-11. The only way for fallen human beings to be righteous is through union with Jesus Christ, a union which takes place through Baptism and Faith. This renewal begins with the grace of Christian Baptism, but in our fallen condition, we need new applications of grace until the end of our earthly pilgrimages. Many aspects of life and experience can be associated with renewal, but notably, it occurs through hearing and reading the Word, participating in the Lord's Supper, and constant prayer. Day by day and week by week, we must continue dying to sin and being "alive unto God through Jesus Christ our Lord" (Romans 6:.11) Only the righteousness that comes through living faith in Jesus Christ truly exceeds that of the scribes and Pharisees!