I will keep thy statutes - Thy commands; thy laws. This expresses the firm purpose of the psalmist, He meant to keep the law of God; he could confidently say that he would do it - yet coupled with the prayer which follows, that God would not forsake him.
O forsake me not utterly - Hebrew, “To very much;” so as to leave me to myself. His confidence that he would keep the commandments of God was based on the prayer that God would not leave him. There is no other ground of persuasion that we shall be able to keep the commandments of God than that which rests on the belief and the hope that He will not leave us.