There remain, however, in man since the fall, the glimmerings of natural understanding, whereby he retains some knowledge of God, of natural things, and of the difference between good and evil, and shows some regard for virtue and for good outward behavior. But so far is this understanding of nature from being sufficient to bring him to a saving knowledge of God and to true conversion that he is incapable of using it aright even in things natural and civil. Nay further, this understanding, such as it is, man in various ways renders wholly polluted, and hinders in unrighteousness, by doing which he becomes inexcusable before God.