| Barnes' Notes on the Bible Lord, I have hoped for thy salvation - As a prevailing habit or principle in my life. I have looked to thee for deliverance in the time of danger; I have looked to thee for salvation in the world to come. And done thy commandments - That is, habitually. This is not, necessarily, a claim to absolute perfection.
Clarke's Commentary on the BibleLord, I have hoped - Thou hast promised deliverance, and I have expected it on the ground of that promise.
Gill's Exposition of the Entire BibleLord, I have hoped for thy salvation,.... Either temporal salvation and deliverance from enemies, and from afflictions, which God had promised, and therefore he had reason to hope for; or spiritual and eternal salvation, resolved on in the mind of God, provided in covenant, promised to be wrought out by Christ, and which since has been accomplished; and therefore there is a sufficient foundation to hope for it; and done thy commandments: this was not the cause, ground, and foundation of his hope; for then it would not have been like an anchor, sure and steadfast, but as the hope of the hypocrite, which is as the spider's web; but this was the effect of his hope; because he had a good hope of salvation, therefore he was studiously concerned to do the commandments of God; his hope prompted him to it, and encouraged him in it; see 1 John 3:2. Kimchi's note here is a good one; "and done thy commandments", not for hope of reward; but I have done them as thy commandments are with me and I know that I shall have salvation, and I have hoped for it.
Geneva Study BibleLORD, I have {d} hoped for thy salvation, and done thy commandments. (d) He shows that we must first have faith before we can work and please God.
Jamieson-Fausset-Brown Bible Commentary166-168. As they keep God's law from motives of love for it, and are free from slavish fear, the are ready to subject their lives to His inspection.
Matthew Henry's Concise Commentary119:161-168 Those whose hearts stand in awe of God's word, will rather endure the wrath of man, than break the law of God. By the word of God we are unspeakable gainers. Every man hates to have a lie told him, but we should more hate telling a lie; by the latter we give an affront to God. The more we see the beauty of truth, the more we shall see the hateful deformity of a lie. We are to praise God even for afflictions; through grace we get good from them. Those that love the world have great vexation, for it does not answer what they expect; those that love God's word have great peace, for it outdoes what they expect. Those in whom this holy love reigns, will not perplex themselves with needless scruples, or take offence at their brethren. A good hope of salvation will engage the heart in doing the commandments. And our love to the word of God must subdue our lusts, and root out carnal affections: we must make heart work of it, or we make nothing of it. We must keep the commandments of God by obedience to them, and his promises by reliance on them. God's eye is on us at all times; this should make us very careful to keep his commandments.
Matthew Henry's Whole Bible CommentaryVerse 166 Here is the whole duty of man; for we are taught, 1. To keep our eye upon God's favour as our end: "Lord, I have hoped for thy salvation, not only temporal but eternal salvation. I have hoped for that as my happiness and laid up my treasure in it; I have hoped for it as thine, as a happiness of thy preparing, thy promising, and which consists in being with thee. Hope of this has raised me above the world, and borne me up under all my burdens in it." 2. To keep our eye upon God's word as our rule: I have done thy commandments, that is, I have made conscience of conforming myself to thy will in every thing. Observe here how God has joined these two together, and let no man put them asunder. We cannot, upon good grounds, hope for God's salvation, unless we set ourselves to do his commandments, Rev. 22:14. But those that sincerely endeavour to do his commandments ought to keep up a good hope of the salvation; and that hope will both engage and enlarge the heart in doing the commandments. The more lively the hope is the more lively the obedience will be. | 
