I taught through the
Sermon on the Mount over about 7 months for my church. Here's my take on the flow of thought:
1. Background - I think
Matt. 1:21 sets the agenda in Matthew's Gospel: (a) who Jesus is, (b) who Jesus' people are, (c) how Jesus saves 'his people from their sin'. This third theme has two parts, as I see it, in Matthew's Gospel - Jesus atones for sin and he transforms sinners (discipleship).
2. Immediate Context - The 'kingdom of heaven' is the thematic vehicle Jesus uses to encompass almost everything about his identity, mission, and his people. Leading into the Sermon on the Mount,
Matt. 4:17-5:1 contrasts Jesus' disciples (who are truly his people) with the crowds he attracted.
3. The Beatitudes (Matt. 5:3-12) function as commands about the disciples' character, motivated by promises of rewards and happiness. With this character, the disciples will/must influence others (Matt. 5:13-16).
4. Jesus' purpose (remember Matt. 1:21 above) is not to replace the Old Testament but to fulfill it (Matt. 5:17-48). Matthew carefully shows in the whole Gospel how Jesus keeps the Law and fulfills direct and typological predictions. But here,
Jesus focuses on the deep transformation he intends to effect in his disciples, enabling
them to keep the Law (part of saving them from their sins). In fact, the Sermon on the Mount is almost exclusively about the transformative element of Jesus' mission; or, you might say this is training for 'his people' on how to live as his disciples.
5. The disciples' entire lives are meant to be worship (Matt. 6). Jesus urges his followers to do three typical (for Jews) works of 'righteousness' (notice 6:1 picks up the same idea as 5:20) with a Godward orientation by aiming at the Father's reward, instead of doing these things with a man-centered orientation (6:1-8, 16-18). Jesus stops in the middle (6:9-15) to describe
how (not
what) he wants his disciples to pray, as well as to reiterate the essential practice of forgiveness (the activity of meek & merciful character).
The disciples' attitude toward what is entrusted to them (money, resources, time) should bring eternal reward and 'light' (vibrant life here and now) because they will make use of God's gifts to help others, to sustain themselves, and for any other God-honoring function. If anyone uses God's temporary gifts for ultimate satisfaction, this amounts to worshiping a false god and will bring temporary 'darkness' and eternal destruction.
6. Jesus' community of disciples must practice his commands together, making progress in character and righteous acts with these two helps: humble accountability to one another (Matt. 7:1-6) and desperate prayer for God's transforming power (Matt. 7:7-11).
7. The Golden Rule is a positive, proactive summary of the whole Sermon on the Mount (Matt. 7:12).
8. Jesus concludes with four illustrations (Matt. 7:13-27) about the urgency of responding to him with obedience; Jesus offers no category within 'his people' for folks who are forgiven of sin but do not submit to his every command. Forgiven people are disciples who are being transformed (produce fruit).
9. Matthew's opinion of Jesus' teaching is summarized by the reaction of the crowd (that has gathered since the Sermon began, compare Matt. 7:28-29 to 5:1-2).