Albert Barnes Commentary Psalms 119:145

"I have called with my whole heart; answer me, O Jehovah: I will keep thy statutes." — Psalms 119:145 (ASV)

I cried with my whole heart ... - This begins a new division of the psalm, indicated by the Hebrew letter Koph (ק q), which corresponds to our letter “k.” The expression “I cried with my whole heart” means that he prayed earnestly and fervently. He had no divided wishes when he prayed.

This is not always so, even with good people. They sometimes offer a form of prayer—that they might be spiritually-minded—when their hearts are intensely worldly, and they would be unwilling to be otherwise.

Or they pray that religion might be revived, when their hearts have no lively interest in it and no wish for it. Or they pray that they might live wholly to God, when they are making all their arrangements to live for the world, and would be greatly disappointed if God should take steps to make them live entirely to Him.

Or they pray that they might be humble, childlike, and sincere, when they have no wish to be different from how they are now. Indeed, they would regard it as an affront if anyone assumed they were not already so, or if they were exhorted to change their course of life.

Often it would be a great surprise—perhaps grief—even to professedly religious persons, if God should answer their prayers, and should make them what they profess to desire to be, and what they pray that they may become. See the notes on Psalms 9:1; compare Psalms 111:1; Psalms 138:1; Psalms 119:2, 10, 34, 58, 69; Jeremiah 24:7.

I will keep Your statutes - It is my purpose and desire to keep Your law perfectly.