The first two Psalms prepare us for what’s to follow with the others. Likewise, Matthew 5:17-20 and Luke 4:14-30 are considered programmatic for their areas to follow.
Matthew 5:17-20: 17Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. 18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. 19 Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven. 20 For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.(KJV)
http://www.enterthebible.org/resourcelink.aspx?rid=785 “Analysis: This summary statement of Jesus on the relationship of the righteousness of the kingdom and the commandments of the law is clearly programmatic for Matthew's understanding of Jesus' message and mission. … It introduces the remainder of the Sermon that will seek to…”
Luke 4:14-16 (of all the Luke 4:14-30) And Jesus returned in the power of the Spirit into Galilee: and there went out a fame of him through all the region round about. And he taught in their synagogues, being glorified of all. 16 And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read. (KJV)
http://www.enterthebible.org/resourcelink.aspx?rid=139 “ANALYSIS: This is the first extensively narrated act of Jesus' public ministry in Luke's Gospel. It is a pivotal scene that serves as a programmatic passage for all of Luke-Acts. Jesus' words give an encapsulated description of the work that he will do, defining him as one empowered by the Spirit of the Lord. The hostile response of the crowd foreshadows the rejection that he will face.”