Matthew 5–7 is the Sermon on the Mount. It’s the longest block of the Savior’s teaching in the Gospels. Luke 6:17–49 has a shorter sermon given “in the plain.” Just before it, in Luke 6:12–16, Jesus “continued all night in prayer to God” and chose the Twelve. Matthew 5 moves in clear sections. The Beatitudes come in 5:3–12. Salt and light come in 5:13–16. Fulfilling the law comes in 5:17–20. In 5:21–47, six contrasts begin “Ye have heard that it was said… But I say unto you.” In 5:48 comes the call to “be ye therefore perfect.” In Luke 6:20–26, Luke pairs four blessings with four woes. He ends in 6:46–49 with the house built on a rock.
The Restoration adds light. The risen Savior taught this sermon again at the temple in Bountiful, in 3 Nephi 12–14. Some differences matter. In 3 Nephi 12:3 it’s “blessed are the poor in spirit who come unto me.” In 12:6, those who hunger and thirst after righteousness “shall be filled with the Holy Ghost.” In 12:22 the phrase “without a cause” is missing from the verse on anger. And in 12:48 He says, “I would that ye should be perfect even as I, or your Father who is in heaven is perfect.” The footnote to Matthew 5:48 explains the Greek word for “perfect.” It means complete, finished, fully developed.
Each “But I say unto you” moves a commandment from the hands to the heart. Not only no murder, but no contempt. Not only no adultery, but no lust. Not only fair payback, but turning the other cheek and going the second mile. In Jesus’s day, Roman soldiers could force a civilian to carry their gear a set distance. He says to carry it twice as far. The chapter’s highest command is to love enemies and pray for those who mistreat us. In 5:44–45 we do it “that ye may be the children of your Father.” He sends sun and rain on the just and the unjust. Luke 6:36 says it in one line: “Be ye therefore merciful, as your Father also is merciful.”
Twenty-five minutes is enough to walk through Matthew 5 in five short readings. Use verses 3–7, 8–12, 13–16, 21–24 and 44–48. Bridge the gaps in a sentence, with one question at each stop. These are the Savior’s own words, so you read them. Handle Matthew 5:27–32 gently. Some in your room have been divorced or remarried. The verses on divorce shouldn’t become a discussion topic. Watch for perfectionism too. Many faithful adults hear “Be ye therefore perfect” as an accusation. The Savior meant it as an invitation He helps us fulfill.