Deal with thy servant according unto thy mercy,.... Which is either general and providential, and reaches to all his creatures; and according to which David had been dealt with all his days, and which he desires a continuance of: or special; and which is in Christ, and communicated through him; and in whom he deals with his people, not according to their merits, but his own mercy; by receiving and accepting them, and admitting them into his presence, and to partake of his favours, and by pardoning their sins and saving their souls; which is not by works of righteousness they have done but according to his abundant mercy; and by giving them eternal life and happiness at the great day; and teach me thy statutes; which is often requested; and which not only shows the need of divine teachings, and the psalmist's earnest and importunate desire to have them; but also that the mercy, grace, and kindness of God, have an influence on the holy life and conversation of the saints, and do not at all encourage licentiousness.