John Gills Exposition of the Bible Commentary - Psalms 19:9
The fear of the Lord is clean ,.... Still the word of God is intended, which teaches men to fear the Lord; gives a full account of the worship of God, which is often meant by the fear of God; it instructs in the matter and manner of worship; and nothing more powerfully engages to serve the Lord with reverence and godly fear than the Gospel does: and this is "clean"; and the doctrines of it direct to the blood of Christ, which cleanses from all sin, and to the righteousness of Christ, the... read more
Matthew Henry's Complete Commentary - Psalms 19:7-14
God's glory, (that is, his goodness to man) appears much in the works of creation, but much more in and by divine revelation. The holy scripture, as it is a rule both of our duty to God and of our expectation from him, is of much greater use and benefit to us than day or night, than the air we breathe in, or the light of the sun. The discoveries made of God by his works might have served if man had retained his integrity; but, to recover him out of his fallen state, another course must be... read more