Verse Seven: Blessed are the merciful, for they shall receive mercy.
Some try to use this verse legalistically, to say that the only way to receive mercy from God, is to show mercy to others. Of course, showing mercy to others, in order to receive it yourself, is not showing mercy at all. Rather this verse explains the relationship between the two backwards to that interpretation. The one who receives mercy from God, will show mercy to others. The one who is not merciful, is so unaware of his own sin problem, that he does not realize that he himself needs mercy. The man who thinks he has conquered sin, and no longer sees his own need for the mercy of God, fails to show mercy to other sinners.
Verse Eight: Blessed are the pure in heart
One could never exhaust the magnitude of this verse. We are told elsewhere in Matthew that out of the natural heart “come evil thoughts, murder, adultery, sexual immorality, theft, false testimony, and slander.” Matt. 15:19
Our heart naturally wants to do evil, and only through regenerative faith in Jesus Christ may the very core of our being be changed. He slowly changes to no longer want the evil desires of the world, but to be transformed into his heart-state.
Pureness of heart must never be confused with outward conformity to rules, for that can be done by anyone. A true heart change can only be done through the redemptive work of Jesus Christ. We cannot ignore the reward of this blessing either, for it is seeing God himself.
Verse 9:Blessed are the peacemakers, for they shall be called sons of God.
"The final beatitude does not say "Blessed are those who are persecuted because they are objectionable, or because they rave like wild-eyed fanatics, or because they pursue some religio-polical cause.' The blessing is restricted to those who suffer persecution because of righteousness."