The psalmist here in a most affectionate manner, like an Israelite indeed, resolves to stick to the word of God and to live and die by it.

I.He resolves to portion himself in it, and there to seek his happiness, nay, there to enjoy it; "Thy testimonies (the truths, the promises, of thy word) have I taken as a heritage for ever, for they are the rejoicing of my heart." The present delight he took in them was an evidence that the good things contained in them were in his account the best things, and the treasure which he set his heart upon. 1. He expected an eternal happiness in God's testimonies. The covenant God had made with him was an everlasting covenant, and therefore he took it as a heritage for ever. If he could not yet say, "They are my heritage," yet he could say, "I have made choice of them for my heritage; and will never take up with a portion in this life," Psa 17:14, Psa 17:15. God's testimonies are a heritage to all that have received the Spirit of adoption; for, if children, then heirs. They are a heritage for ever, and that no earthly heritage is (Pe1 1:4); all the saints accept them as such, take up with them, live upon them, and can therefore be content with but little of this world. 2. He enjoyed a present satisfaction in them: They are the rejoicing of my heart, because they will be my heritage for ever. It requires the heart of a good man to see his portion in the promise of God and not in the possessions of this world.

II.He resolves to govern himself by it and thence to take his measures: I have inclined my heart to do thy statutes. Those that would have the blessings of God's testimonies must come under the bonds of his statutes. We must look for comfort only in the way of duty, and that duty must be done, 1. With full consent and complacency: "I have, by the grace of God, inclined my heart to it, and conquered the aversion I had to it." A good man brings his heart to his work and then it is done well. A gracious disposition to do the will of God is the acceptable principle of all obedience. 2. With constancy and perseverance. He would perform God's statutes always, in all instances, in the duty of every day, in a constant course of holy walking, and this to the end, without weariness. This is following the Lord fully.

Depart from me, ye evildoers,.... The same with the evil thinkers, Psa 119:113; According to Aben Ezra, they that think evil commonly do it; as they devise it, they commit it. This describes such persons whose course of life is, and who make it their constant business to do, iniquity; such the psalmist desires to depart his presence, to keep at a distance from him, as being very disagreeable to him; and who would be a great hinderance to him in keeping the commandments of God, as follows: these same words will be spoken by David's son and antitype, at the great day of account, Mat 7:23;

for I will keep the commandments of my God; of God who has a fight to command, and not of men, especially when opposed to the commands of God; of God, who is the covenant God and Father of his people; and whose covenant, grace, and favour, in choosing, redeeming, regenerating, and adopting them, lay them under greater obligations still to keep his commandments; and whose commandments are not grievous: and though they cannot be perfectly kept by good men, yet they are desirous of keeping them as well as they can, and determine in the strength of divine grace so to do; and which they do out of love to God, and with a view to his glory, without any selfish or mercenary ends. The Syriac version renders it, "that I may keep", &c. to which end he desires to be rid of the company of wicked men; who are both a nuisance to good men, and an hinderance in religious duties.