The real secret of its power however lies not merely in its force as an argument to refute objections against revelation, but in its positive effect as a philosophy,(492) opening up a grand view of the divine government, and giving an explanation of revealed doctrines, by using analogy as the instrument for adjusting them into the scheme of the universe.(493) He seems himself to have taken a broad view of God’s dealings in the moral world, analogous to that which the recent physical discoveries of his time had exhibited in the natural. In the same manner as Newton in his Principia had, by an extension of terrestrial mechanics, explained the movements of the celestial orbs, and united under one grand generalization the facts of terrestrial and celestial motion; so Butler aimed at exhibiting as instances of one and the same set of moral laws the moral government of God, which is visible to natural reason, and the spiritual government, which is unveiled by revelation. Probably no book since the beginning of Christianity has ever been so useful to the church as Butler’s Analogy, in solving the doubts of believers or causing them to ignore exceptions, as well as in silencing unbelievers. The office of apologetic is to defend the church, not to build it up. Argument is not the life of the church. It is therefore a proof of the philosophical power and truth of Butler’s work that it has ministered so extensively to the latter purpose, by actually reinforcing and promoting the faith of professing Christians. It has acted not only as an argument to the deists, but as a lesson of instruction to the church. Few efforts of free thought seemed more unpromising in yielding any useful results than deism; yet by its agitation of deep questions, which are not the mere phantoms of a morbid mind, but real and solid difficulties and mysteries in revelation, it was the means of creating Butler’s noble work, and is a fresh illustration of the beneficent arrangement of the Almighty, that makes knowledge progress by antagonism, and overrules evil for good.