[16] Nathan Appleton's interest in theology may be seen in his book entitled The Doctrine of Original Sin and the Trinity, discussed in a Correspondence between a Clergyman of the Episcopal Church, in England, and a Layman of Boston, United States, published in Boston in 1859. "I was brought up," he said in one of these letters, "in the strictest form of Calvinistic Congregationalism; but since arriving at an age capable of examining the subject, and after a careful study of it, I have renounced what appear to me unworthy views of the Deity, for a system which appears to me more worthy of him, and less abhorrent to human reason." "I can say," he wrote in another letter, "that the Unitarian party embraces the most intelligent and high-minded portion of the community. It is my opinion that the views of the Unitarians are the best and only security against the spirit of infidelity which is prevailing so extensively amongst the most highly educated and intelligent men in Europe." See Memoir of Nathan Appleton, by Robert C. Winthrop. [17] John Murray Forbes: Letters and Recollections, edited by his daughter, Sarah Forbes Hughes. [18] Boston Unitarianism, 93, 94, 101, 127. XVIII. UNITARIANS AND EDUCATION. The interest of Unitarians in education has always been very great, but it has not been in the direction of building and fostering sectarian institutions. As a body, Unitarians have not only been opposed to denominational colleges, but they have been leaders in promoting unsectarian education. Freedom of academic teaching and the scientific study of theology may be found where Unitarianism has no existence, and yet it is significant that in this country such mental liberty should have first found expression under Unitarian auspices. From the first, American Unitarianism has been unsectarian and liberty-loving, taking an attitude of toleration, free investigation, and loyalty to truth. That it has always been faithful to its ideal cannot be maintained, and yet its history shows that the open-mindedness and the spirit of freedom have never been wholly ignored. [Sidenote: Pioneers of the Higher Criticism.]