Psalms 31:19

“[O] how great [is] thy goodness, etc.] Not the natural and essential goodness of God; for though that is large and abundant, yea, infinite, as every perfection of his is, yet it cannot with propriety be said to be laid up and wrought out; but rather the effects of his goodness, and not those which appear in Providence, for they, though very large and plenteous, are common to all, and are not restrained to them that fear the Lord, and trust in him; but such as are displayed in a way of special grace and favour to his own people, and which the psalmist saw his interest in and was affected with; and which supported his faith under his present troubles, and appeared to be so great, both for…”

“God displays openly His purposed goodness to His people.”

“Oh how great is thy goodness - That is, in view of the divine protection and favor in such cases, or when thus assailed. The psalmist seems to have felt that it was an inexpressible privilege thus to be permitted to appeal to God with the assurance of the divine protection. In few circumstances do people feel more grateful for the opportunity of appealing to God than when they are reviled and calumniated. As there is nothing which we feel more keenly than calumny and reproach, so there can be no circumstances when we more appreciate the privilege of having such a Refuge and Friend as God. Which thou hast laid up - Which thou hast “treasured” up, for so the Hebrew word means. That is,…”

“Laid up - His favour is not always manifested, to them, but it is laid up for them in his treasure, whence it shall be drawn forth when they need it, and he sees it fit. Before - Publickly and in the view of the world. Psalms 31:20”

“31:19-24 The psalmist thanks the Lord for answering his prayer (31:1-18) and rescuing him. 31:19-20 Since the godly are under the Lord’s protection and shelter, evil has no power over them.”

“Oh: Psa 36:7-10, Psa 73:1, Psa 73:24-26, Psa 145:7-9; Isa 64:4; Lam 3:23-25; Co1 2:9; Jo1 3:1, Jo1 3:2 laid up: Psa 16:11; Isa 35:10; Col 3:2-4; Heb 10:34; Jam 2:5; Pe1 1:4, Pe1 1:5 wrought: Psa 68:28, Psa 126:2, Psa 126:3; Num 23:23; Isa 26:12; Joh 3:21; Act 15:12; Co2 5:5 Psalms 31:20”

“(Heb.: 31:20-25) In this part well-grounded hope expands to triumphant certainty; and this breaks forth into grateful praise of the goodness of God to His own, and an exhortation to all to wait with steadfast faith on Jahve. The thought: how gracious hath Jahve been to me, takes a more universal form in Psa 31:20. It is an exclamation (מה, as in Psa 36:8) of adoring admiration. טוּב יהוה is the sum of the good which God has treasured up for the constant and ever increasing use and enjoyment of His saints. צפן is used in the same sense as in Psa 17:14; cf. τὸ μάννα τὸ κεκρυμμένον, Rev 2:17. Instead of פּעלתּ it ought strictly to be נתתּ; for we can say פּעל טּוב, but not פּעל טוּב. What…”