We use the law lawfully when we use it as a test whereby to judge of the exercise of grace. Believers differ so much from what they once were, and from what many still are, that without this right use of the law, comparing themselves with their former selves, or with others, they would be prone to think more highly of their attainments than they ought. But when they recur to this standard (the Law), they sink into the dust, and adopt the language of Job, "Behold, I am vile; I cannot answer thee one of a thousand."