The "Rudiments of Theological and Moral Science" may be considered the summing up of Mr. Williamson's theological thinking during his ministry. It is a notable vindication of the Divine Sovereignty, a sovereignty infinitely glorified in the Divine Paternity. Although some of its reasonings savor too much of what is called fatalism to be accepted as practically healthful when men are called upon to "work out their own salvation with fear and trembling," it is in the highest degree helpful and hopeful to all of weak faith who need to realize that God has will and purpose of his own, and works within his children "to will and to do of his own good pleasure." God's beneficent sovereignty was to him the adamantine foundation of the Gospel. As strong and effective by voice and pen as the ministry of this good man has been, there were those at the beginning of it who were inclined to wonder at his attempt to enter this profession. Light-minded critics uttered their innocent witticisms, and sober well-wishers of our denomination very plainly hinted to him that he might possibly do quite as much service to it in some other line of effort than that of preaching! But all this to the pure-minded young soldier of the Cross was but an incentive to renewed exertion. They who doubted knew not that the Lord had called him, and had purposed for him a life of honorable labor in his holy service. Father Ballou used to say, "When the Lord undertakes to make a minister, he always makes a good one." Dr. Williamson was thus made. He has given "full proof" of his ministry, and now having gone "up higher," his works will follow him.