I'm Salty
Jesus instructed them in view of His announcement of the coming kingdom (4:17). Natural questions on the heart of every Jew would have been, “Am I eligible to enter Messiah’s kingdom? Am I righteous enough to qualify for entrance?” The only standard of righteousness the people knew was that laid down by the current religious leaders, the scribes and Pharisees. Would one who followed that standard be acceptable in Messiah’s kingdom? Jesus’ sermon therefore must be understood in the context of His offer of the kingdom to Israel and the need for repentance to enter that kingdom. The sermon did not give a “Constitution” for the kingdom nor did it present the way of salvation. The sermon showed how a person who is in right relationship with God should conduct his life.
The poor in spirit (Matt. 5:3) are those who consciously depend on God, not on themselves; they are “poor” inwardly, having no ability in themselves to please God (cf. Rom. 3:9–12). Those who mourn (Matt. 5:4) recognize their needs and present them to the One who is able to assist.
Those who are meek (v. 5) are truly humble and gentle and have a proper appreciation of their position. (Praeis, the Gr. word rendered “meek,” is translated “gentle” in its three other usages in the NT: 11:29; 21:5; 1 Peter 3:4.) Those who hunger and thirst for righteousness (Matt. 5:6) have a spiritual appetite, a continuing desire for personal righteousness.
The merciful (v. 7) extend mercy to others, thus demonstrating God’s mercy which has been extended to them. The pure in heart (v. 8) are those who are inwardly clean from sin through faith in God’s provision and a continual acknowledging of their sinful condition
The peacemakers (v. 9) show others how to have inward peace with God and how to be instruments of peace in the world. They desire and possess God’s righteousness even though it brings them persecution (v. 10).
These qualities contrast sharply with Pharisaic “righteousness.” The Pharisees were not “poor in spirit”; did not “mourn” in recognition of their needs; were proud and harsh, not humble and gentle; they felt they had attained righteousness and therefore did not have a continual appetite or desire for it; they were more concerned with “legalities” of God’s and their own laws than with showing mercy; were pure ceremonially but not inwardly; created a rift, not peace in Judaism; and certainly did not possess true righteousness.
Jesus’ followers who possess these qualities become heirs of the kingdom (vv. 3, 10) on earth (v. 5), receive spiritual comfort (v. 4) and satisfaction (v. 6), receive mercy from God and others (v. 7), will see God (v. 8), that is, Jesus Christ, who is God “in a body” (1 Tim. 3:16; cf. John 1:18; 14:7–9). His followers were known as God’s sons (Matt. 5:9; cf. Gal. 3:26) for they partook of His righteousness (Matt. 5:10).