In a notable passage on change of religion, in his Essay in Aid of a Grammar of Assent, chap. vii., Cardinal Newman seems to allude to the career of himself and his brothers. He says: "Thus of three Protestants, one becomes a Catholic, a second a Unitarian, and a third an unbeliever: how is this? The first becomes a Catholic, because he assented, as a Protestant, to the doctrine of our Lord's divinity, with a real assent and a genuine conviction, and because this certitude, taking possession of his mind, led him on to welcome the Catholic doctrines of the Real Presence and of the Theotocos, till his Protestantism fell off from him, and he submitted himself to the Church. The second became a Unitarian, because, proceeding on the principle that Scripture was the rule of faith, and that a man's private judgment was its rule of interpretation, and finding that the doctrine of the Nicene and Athanasian Creeds did not follow by logical necessity from the text of Scripture, he said to himself, 'The word of God has been made of none effect by the traditions of men,' and therefore nothing was left for him but to profess what he considered primitive Christianity and to become a Humanitarian. The third gradually subsided into infidelity, because he started with the Protestant dogma, cherished in the depths of his nature, that a priesthood was a corruption of the simplicity of the Gospel. First, then, he would protest against the sacrifice of the Mass; next he gave up baptismal regeneration and the sacramental principle; then he asked himself whether dogmas were not a restraint on Christian liberty as well as Sacraments; then came the question, What after all was the use of teachers of religion? Why should any one stand between him and his Maker? After a time it struck him that this obvious question had to be answered by the Apostles, as well as by the Anglican clergy; so he came to the conclusion that the true and only revelation of God to man is that which is written on the heart. This did for a time, and he remained a Deist. But then it occurred to him, that this inward moral law was there within the breast, whether there was a God or not, and that it was a roundabout way of enforcing that law, to say that it came from God and simply unnecessary, considering it carried with it its own sacred and sovereign authority, as our feelings instinctively testified, and when he turned to look at the physical world around him, he really did not see what scientific proof there was of the Being of God at all, and it seemed to him as if all things would go quite as well as at present without that hypothesis as with it; so he dropped it, and became a purus putus Atheist."