Here is, 1. The notion David had of religion; it is keeping God's righteous judgments. God's commands are his judgments, the dictates of infinite wisdom. They are righteous judgments, consonant to the eternal rules of equity, and it is our duty to keep them carefully. 2. The obligation he here laid upon himself to be religious, binding himself, by his own promise, to that which he was already bound to by the divine precept, and all little enough. "I have sworn (I have lifted up my head to the Lord, and I cannot go back) and therefore must go forward: I will perform it." Note, (1.) It is good for us to bind ourselves with a solemn oath to be religious. We must swear to the Lord as subjects swear allegiance to their sovereign, promising fealty, appealing to God concerning our sincerity in this promise, and owning ourselves liable to the curse of we do not perform it. (2.) We must often call to mind the vows of God that are upon us, and remember that we have sworn. (3.) We must make conscience of performing unto the Lord our oaths (an honest man will be as good as his word); nor have we sworn to our own hurt, but it will be unspeakably to our hurt if we do not perform.

The wicked have laid a snare for me,.... To draw him into sin, and so into mischief; and even to take away his life, as they are said to dig pits for him, Psa 119:85;

yet I erred not from thy precepts: not wilfully and wickedly, though through inadvertence and infirmity, as he often did, and every good man does; and indeed his errors are so many, that they cannot be understood and numbered. The sense is, he kept on in the way of his duty; did not desist from that, or wickedly depart from his God, and his worship, to escape the snares of bad men.