Augustine of Hippo
This passage may rightly be associated with David himself, rather than solely with the Mediator, the Lord Jesus Christ, but rather with the entire Church, now fully realized in Christ. Examine my heart, O Lord, for I have walked in integrity (Psalm 25:1). Examine me, O Lord, for following the grace You have extended to me, I possess some standing in my integrity, which I have diligently upheld. With confidence in the Lord, I shall not be moved. Yet, my trust lies not in my own strength, but in the Lord; I shall remain steadfast in Him.