When religion is in the hands of the mere natural man, he is always the worse for it; it adds a bad heat to his own dark fire and helps to inflame his four elements of selfishness, envy, pride, and wrath. And hence it is that worse passions, or a worse degree of them are to be found in persons of great religious zeal than in others that made no pretenses to it. History also furnishes us with instances of persons of great piety and devotion who have fallen into great delusions and deceived both themselves and others. The occasion of their fall was this: ... They considered their whole nature as the subject of religion and divine graces; and therefore their religion was according to the workings of their whole nature, and the old man was as busy and as much delighted in it as the new.