| Barnes' Notes on the Bible I am thy servant - See the notes at Psalm 116:16. Give me understanding, that I may know thy testimonies - Since I am thy servant, instruct me in the knowledge of thy will. As I desire to obey thee, show me what will be acceptable obedience, or what thou dost require in order to acceptable service. This is a prayer of piety. A man who sincerely desires to obey God will make it a first point to ascertain what is his will, or what will constitute true obedience.
Clarke's Commentary on the BibleI am thy servant - See on Psalm 119:94 (note).
Gill's Exposition of the Entire BibleI am thy servant,.... Not only by creation, but by grace; and as he had a work to do, he desires to know what it was; and as it was proper he should know his Master's will, he applies to him for it; using this as an argument, that he was his servant, devoted to his service, and willing to perform it to the best of his knowledge and ability; and therefore prays, give me understanding, that I may know thy testimonies; the Scriptures, which testify of the will of God; which are only rightly understood by those who have their understandings opened and enlightened; or have an understanding given them, that they may understand them, so as to receive and embrace the doctrine, and do the precepts of them: and such an understanding is the gift of God, and owing to his powerful and efficacious grace; see Luke 24:45.
Geneva Study BibleI am thy servant; give me understanding, that I may know thy testimonies.
Matthew Henry's Concise Commentary119:121-128 Happy is the man, who, acting upon gospel principles, does justice to all around. Christ our Surety, having paid our debt and ransom, secures all the blessings of salvation to every true believer. The psalmist expects the word of God's righteousness, and no other salvation than what is secured by that word, which cannot fall to the ground. We deserve no favour form God; we are most easy when we cast ourselves upon God's mercy, and refer ourselves to it. If any man resolve to do God's will as his servant, he shall be made to know his testimonies. We must do what we can for the support of religion, and, after all, must beg of God to take the work into his own hands. It is hypocrisy to say we love God's commandments more than our worldly interests. The way of sin is a false way, being directly contrary to God's precepts, which are right: those that love and esteem God's law, hate sin, and will not be reconciled to it. | 
