Psalms 30:6

“And in my prosperity, etc.] Either outward prosperity, when he was settled in his kingdom, and as acknowledged king by all the tribes of Israel, and had gotten the victory over all his enemies, and was at rest from them round about; or inward and spiritual prosperity, having a spiritual appetite for the word, being in the lively exercise of grace, growing in it, and in the knowledge of Christ; favoured with communion with God, having flesh discoveries of pardoning grace and mercy, corruptions being subdued, the inward man renewed with spiritual strength, and more fruitful in every good word and work. This being the case, I said, I shall never be moved; so in outward prosperity men are apt to…”

“What particular prosperity is meant we do not know; perhaps his accession to the throne. In his self-complacent elation he was checked by God's hiding His face (compare Psa 22:24; Psa 27:9).”

“And in my prosperity I said, I shall never be moved - I shall never be visited with calamity or trial. This refers to a past period of his life, when everything seemed to be prosperous, and when he had drawn around him so many comforts, and had apparently made them so secure, that it seemed as if they could never be taken from him, or as if he had nothing to fear. To what precise period of his life the psalmist refers, it is now impossible to ascertain. It is sufficient to say, that men are often substantially in that state of mind. They have such vigorous constitutions and such continued health; their plans are so uniformly crowned with success; everything which they touch so certainly…”

“30:6-7 Nothing can stop me now! The psalmist confesses his presumptuous attitude (cp. 32:3-4). • secure as a mountain: In the psalms, this phrase creates a powerful image of stability and of God’s control (see 11:1; 18:7; 36:6; 46:2; 72:3; 76:4; 83:14; 97:5; 114:4, 6; 125:2). • I was shattered: The absence of God’s favor destroys the security of the proud (cp. 104:27-30).”

“And: Job 29:18-20; Isa 47:7, Isa 56:12; Dan 4:30; Luk 12:19; Co2 12:7 I shall: Psa 15:5, Psa 16:8, Psa 119:117 Psalms 30:7”

“(Heb.: 30:7-8) David now relates his experience in detail, beginning with the cause of the chastisement, which he has just undergone. In ואני אמרתּי (as in Psa 31:23; Psa 49:4) he contrasts his former self-confidence, in which (like the רשׁע, Psa 10:6) he thought himself to be immoveable, with the God-ward trust he has now gained in the school of affliction. Instead of confiding in the Giver, he trusted in the gift, as though it had been his own work. It is uncertain, - but it is all the same in the end, - whether שׁלוי is the inflected infinitive שלו of the verb שׁלי (which we adopt in our translation), or the inflected noun שׁלו (שׁלוּ) = שׁלו, after the form שׂחוּ, a swimming, Eze 47:5, =…”