The history of the theological studies of Sir Isaac Newton will ever be regarded as one of the most interesting portions of his life. That he who among all the individuals of his species possessed the highest intellectual powers was not only a learned and profound divine, but a firm believer in the great doctrines of religion, is one of the proudest triumphs of the Christian faith. Had he distinguished himself only by an external respect for the offices and duties of religion; and had he left merely in his last words an acknowledgment of his faith, his piety would have been regarded as a prudent submission to popular feeling, and his last aspirations would have been ascribed to the decay or to the extinction of his transcendent powers. But he had been a Christian from his youth, and though never intended for the church, yet he interchanged the study of the Scriptures with that of the laws of the material universe; and from the examination of the works of the Supreme Creator he found it to be no abrupt transition to investigate the revelation of his will, and to contemplate the immortal destinies of mankind. But when the religious habits of Sir Isaac Newton could not be ascribed to an ambition of popularity, to the influence of weak health, or to the force of professional impulse, it became necessary for the apostles of infidelity to refer it to some extraordinary cause. His supposed insanity was therefore eagerly seized upon by some as affording a plausible origin for his religious principles; while others, without any view of supporting the cause of skepticism, ascribed his theological researches to the habits of the age in which he lived, and to a desire of promoting political liberty, by turning against the abetters of despotism those powerful weapons which the Scriptures supplied. The anxiety evinced by M. de Laplace to refer his religious writings to a late period of his life seems to have been felt also by M. Biot, who has gone so far as to fix the very date of one of his most important works, and thus to establish the suspicions of his colleague.