Psalms 25:8

God's promises are here mixed with David's prayers. Many petitions there were in the former part of the psalm, and many we shall find in the latter; and here, in the middle of the psalm, he meditates upon the promises, and by a lively faith sucks and is satisfied from these breasts of consolation; for the promises of God are not only the best foundation of prayer, telling us what to pray for and encouraging our faith and hope in prayer, but they are a present answer to prayer. Let the prayer be made according to the promise, and then the promise may be read as a return to the prayer; and we are to believe the prayer is heard because the promise will be performed. But, in the midst of the promises, we fine one petition which seems to come in somewhat abruptly, and should have followed upon Psa 25:7. It is that (Psa 25:11), Pardon my iniquity. But prayers for the pardon of sin are never impertinent; we mingle sin with all our actions, and therefore should mingle such prayers with all our devotions. He enforces this petition with a double plea. The former is very natural: "For thy name's sake pardon my iniquity, because thou hast proclaimed thy name gracious and merciful, pardoning iniquity, for thy glory-sake, for thy promise-sake, for thy own sake," Isa 43:25.

— Matthew Henry's Concise Commentary (public domain)

upright--acting according to His promise. sinners--the general term, limited by the meek--who are penitent. the way--and his way--God's way of providence.

— Jamieson-Fausset-Brown Commentary (public domain)