Regarding religion as a saving institution in the form of a visible organised Church maintained by God and provided with all the means of grace, Catholicism was bound to end in a sort of mechanical psychology, and to explain the sentiment of piety as the inward effect of the outward and supernatural institution. This is done by Bellarmine and de Bonald, the most consistent of the Catholic theologians. Protestantism, on the contrary, which makes of the faith of the heart, of the immediate and personal relation of the soul to God, the very principle of justification, and of all religious life, was bound none the less logically to end, by analysis, in a more profound psychology, and to refer to an inward principle all the forms and manifestations of religion. Religious history thus becomes homogeneous, and runs parallel with that of all the other activities of the human mind. None the less, this subjectivity of the religious principle frightens many good men. Persons devoted to practice, and unconsciously dominated by the habits and necessities of ecclesiastical government and religious teaching, hesitate to enter upon a road so naturally opened. As, from generation to generation, religion has been taught and propagated externally by the Church, the family, or special agents, it is impossible for them to imagine that it was not always so, and not to trace back to God Himself that chain or tradition of external instruction. In which they are certainly right. Their only error, but it is a grave one, is to represent God as an ordinary teacher, the first of a series, who once acted, like the rest of them, upon His pupils from without; whereas God works in all souls, acts and teaches without ceasing through all human masters, and is present throughout the whole religious education of humanity.