5:1,2 None will find happiness in this world or the next, who do not seek it from Christ by the rule of his word.
Those that mourn are happy. That godly sorrow which worketh true repentance, watchfulness, a humble mind, and continual dependence for acceptance on the mercy of God in Christ Jesus, with constant seeking the Holy Spirit, to cleanse away the remaining evil, seems here to be intended. Heaven is the joy of our Lord; a mountain of joy, to which our way is through a vale of tears. Such mourners shall be comforted by their God.
Those who are persecuted for righteousness’ sake are happy. (…) Yet there is nothing in our sufferings that can merit of God; but God will provide that those who lose for him, though life itself, shall not lose by him in the end.
5:13-16 Ye are the salt of the earth. (…) Our light must shine, by doing such good works as men may see. What is between God and our souls, must be kept to ourselves; but that which is of itself open to the sight of men, we must study to make suitable to our profession, and praiseworthy. We must aim at the glory of God.
5:17-20 Let none suppose that Christ allows his people to trifle with any commands of God’s holy law. No sinner partakes of Christ’s justifying righteousness, till he repents of his evil deeds. The mercy revealed in the gospel leads the believer to still deeper self-abhorrence.
Christ’s righteousness, imputed to us by faith alone, is needed by every one that enters the kingdom of grace or of glory; but the new creation of the heart to holiness, produces a thorough change in a man’s temper and conduct.
5:21-26 We ought carefully to preserve Christian love and peace with all our brethren; and if at any time there is a quarrel, we should confess our fault, humble ourselves to our brother, making or offering satisfaction for wrong done in word or deed: and we should do this quickly; because, till this is done, we are unfit for communion with God in holy ordinances. And when we are preparing for any religious exercises, it is good for us to make that an occasion of serious reflection and self-examination.”