Psalms 40:16

Let all those that seek thee,.... In the first place, with their whole hearts, earnestly and diligently, in Christ, and under the influences of his Spirit, for pardon, righteousness, communion, larger measures of grace, and for honour, glory, immortality, and eternal life;

rejoice and be glad in thee: as their covenant God, the Father of their mercies, the God of all comfort and salvation, who pardons their sins, clothes them with the robes of righteousness and garments of salvation, and accepts their persons in Christ; all which is matter of joy and gladness: Christ is concerned for the joy of his people, John 15:11; the Targum is, "they shall", or "let them rejoice, and be glad in thy word": in himself, the essential Word, in whom there is always ground and reason of joy and gladness; because of his person, blood, righteousness, and sacrifice;

let such as love thy salvation; either Christ, who is God's salvation,

Genesis 49:18; and who is loved by his people, universally, superlatively, and sincerely; or the salvation of him, his deliverance from the grave, resurrection from the dead, and exaltation; the benefits of which believers share in, and so have reason to love it: or the salvation he is the author of, which is loved by those that know it; partly because agreeable to the divine perfections, the glory of God is great in it; and partly because it is so full and complete in itself, and so suitable to them;

say continually, the Lord be magnified; let this be their constant employment in this world, as it will be for ever in the next, to ascribe greatness to God; or greatly to praise him, because of the great salvation wrought out for them.