Verse. 145. — I cried with my whole heart. His prayer was a sincere, plaintive, painful, natural utterance, as of a creature in pain. We cannot tell whether at all times he used his voice when he thus cried; but we are informed of something which is of much greater consequence, he cried with his heart. Heart cries are the essence of prayer. He mentions the unity of his heart in this holy engagement. His whole soul pleaded with God, his entire affections, his united desires all went out towards the living God. It is well when a man can say as much as this of his prayers: it is to be feared that many never cried to God with their whole heart in all their lives. There may be no beauty of elocution about such prayers, no length of expression, no depth of doctrine, nor accuracy of diction; but if the whole heart be in them they will find their way to the heart of God.
Hear me, O Lord. He desires of Jehovah that his cries may not die upon the air, but that God may have respect to them. True supplicants are not satisfied with the exercise itself, they have an end and object in praying, and they look out for it. If God does not hear prayer we pray in vain. The term "hear" is often used in Scripture to express attention and consideration. In one sense God hears every sound that is made on earth, and every desire of every heart; but David meant much more; he desired a kindly, sympathetic hearing, such as a physician gives to his patient when he tells him his pitiful story. He asked that the Lord would draw near, and listen with friendly ear to the voice of his complaint, with the view of pitying him and helping him. Observe, that his wholehearted prayer goes to the Lord alone; he has no second hope or help. "Hear me, O Lord, "is the full range of his petition and expectation.
I will keep thy statutes. He could not expect the Lord to hear him if he did not hear the Lord, neither would it be true that he prayed with his whole heart unless it was manifest that he laboured with all his might to be obedient to the divine will. His object in seeking deliverance was that he might be free to fulfil his religion and carry out every ordinance of the Lord. He would be a free man that he might be at liberty to serve the Lord. Note well that a holy resolution goes well with an importunate [persistent] supplication: David is determined to be holy, his whole heart goes with that resolve as well as with his prayers. He will keep God's statutes in his memory, in his affections, and in his actions. He will not wilfully neglect or violate any one of the divine laws.
From The Treasury of David.