For thou, Jehovah, wilt bless the righteous. The Psalmist here confirms the concluding sentence of the preceding verse, namely, that all the servants of God in common will take support to their faith from what he had experienced, for he would have us from one example to form our judgment of the immutability and perpetuity of God's grace towards all the godly. Again, by this he teaches us that there is no true and right joy but that which is derived from the sense of God's fatherly love. The word, to bless, in Hebrew, (when we speak of this as the act of men,) signifies to wish happiness and prosperity to any one, and to pray for him; but when it is spoken of as the act of God, it signifies the same thing as to prosper a man, or to enrich him abundantly with all good things; for since the favor of God is efficacious, his blessing of itself produces an abundance of every good thing. The name righteous is not restricted to any one man, but signifies in general all the servants of God. Those, however, who are called righteous in Scripture, are not so called on account of the merit of their works, but because they aspire after righteousness; for after God has received them into his favor, by not imputing their sins to them, he accepts their upright endeavors for perfect righteousness. What follows is of the same import as the preceding clause, Thou wilt crown them with thy free favor, or good will, as with a shield The Psalmist's meaning is, that the faithful shall be completely defended on all sides, since he will, in no case, withhold from them his grace, which is to them an invincible fortress, and brings along with it certain safety. The word, to crown, which the Psalmist employs, often denotes in Hebrew, ornament or glory; but as there is added the similitude of a shield, I have no doubt but he uses it metaphorically for, to fortify or to compass about. [1] The meaning, therefore, is, that however great and various may be the dangers which besiege the righteous, they shall, notwithstanding, escape, and be saved, because God is favorable to them.

Footnotes

1 - Bishop Horsley thinks ktsnh, katsinah, as with a shield, should be construed with rtsvn ratson, favor or good will, and translates the words thus: "Like a shield of good will, thou wilt stand guard around him." The reading of the Septuagint is the same: Os hoplo eudokias, as with a shield of good will. The word tsnh tsinah, means that kind of shield, from the middle of which there arose a large boss, surmounted by a dagger and which was highly useful both as a defensive and an offensive weapon in ancient warfare.

For thou, Lord, wilt bless the righteous - It is one of the characteristics of God that, while he will punish the wicked, he will show favor to the righteous; while he brings deserved punishment upon the one, he will show his favor to the other.
With favor wilt thou compass him as with a shield - That is, as a shield is thrown round or before one in the day of battle to protect him, so wilt thou throw thy protection around the righteous. For a description of a "shield," see the notes at Ephesians 6:16. Compare the notes at Psalm 3:3. On these accounts, David felt that he might trust in God in the day of trouble and danger; and, on the same account, all who are righteous may put their trust in him now.

For thou, Lord, wilt bless the righteous - A righteous soul is a peculiar object of God's affectionate regards; and therefore will be a subject of continual blessing.
With favor - Literally, Like a shield, thy favor will crown him. God loves such; and this love is their defense. In all places, times and circumstances, it will preserve them. "Keep yourselves," says the apostle, "in the love of God." He who abides in this love need not fear the face of any adversary. Thus ended the morning's devotion of this excellent man: a model by which every Christian may frame his own.

For thou, LORD, wilt bless the righteous; with favour (i) wilt thou compass him as [with] a shield.
(i) So that he will be safe from all dangers.

For thou, Lord, wilt bless the righteous. As he has blessed him with a righteousness, even the righteousness of God imputed to him, by which he is denominated righteous, and with the forgiveness of his sins; so he will bless him with peace and prosperity, with all spiritual blessings, with the blessings of grace here, and glory hereafter. Hence he has just reason to rejoice and be glad;
with favour wilt thou compass him as with a shield: by which is meant the free favour, love, and grace of God in Christ, which springs from his sovereign will and pleasure; is his good will to men, and the exceeding riches of his grace, shown in his kindness towards them in Christ Jesus: and the compassing or crowning of the righteous with it, as the word (x) signifies, is expressive of the abundance of it, in the application of it to them in conversion, and in every instance and blessing of grace; for such are crowned with lovingkindness and tender mercies; the grace of the Lord is exceeding abundant towards them, it flows and overflows; it surrounds them on all sides, and covers them all over: it is as a shield unto them from all their enemies, Psalm 40:11; and which being held in the hand of faith, quenches the fiery darts of Satan; and is the saints security from every enemy, and from all hurt and danger, here or hereafter; see Zephaniah 3:17; and is a crown of glory upon them, which makes them glorious, lovely, and amiable. Some interpret this of Christ the righteous One; so Nebiensis.
(x) , Sept. "coronasti nos", V. L. Arab. Ethiop. "coronabis cum", Pagninus, Montanus, Cocceius.

with favour--or, "acceptance," alluding to the favor shown to an acceptable offering and worshipper (Leviticus 7:18; Leviticus 19:7).
shield--(compare Psalm 3:3).