Psalms 19:8

Statutes, another word signifying the same thing with law and testimonies, are right; both in themselves, as being free from crookedness or error; and in their effect, as guiding and directing men in the right and ready way to eternal happiness: which also reflects upon that knowledge of divine things, which men have by the light of nature and works of God, or by the doctrines of the philosophers or others, that wanted or neglected the light of God's word wherein there is a great deal of darkness, and uncertainty, and error, and danger. Rejoicing the heart; partly by that clear and certain knowledge of divine things which it gives, for knowledge is pleasant to the soul, Proverbs 2:10; and partly by the discoveries of God's love and grace to sinful men, in offers and promises of mercy therein contained. The commandment of the Lord, i.e. all his commands. Is pure; without the least mixture of error, or injustice, or deceit; which cannot be said of human laws. Enlightening the eyes, to wit, of the mind, with an evident and complete manifestation of God's will and man's duty; both which the works of nature and all the writings of men discover but darkly and imperfectly.