Still considered essential reading for serious thinkers on religion more than a century and a half after it was written, this seminal work of modern theology, first published in 1845, presents a history of Catholic doctrine from the days of the Apostles to the time of its writing, and follows with specific examples of how the doctrine has not only survived corruption but grown stronger through defending itself against it, and is, therefore, the true religion. This classic of Christian apologetics, considered a foundational work of 19th-century intellectualism on par with Darwin's Origin of Species, is must reading not only for the faithful but also for anyone who wishes to be well educated in the fundamentals of modern thought.

An Essay on the Development of Christian Doctrine, reprinted from the 1878 edition, “is rightly regarded as one of the most seminal theological works ever to be written,” states Ian Ker in his foreword to this sixth edition. “It remains,” Ker continues, "the classic text for the theology of the development of doctrine, a branch of theology which has become especially important in the ecumenical era.” John Henry Cardinal Newman begins the Essay by defining how true developments in doctrine occur. He then delivers a sweeping consideration of the growth of doctrine in the Catholic Church from the time of the Apostles to his own era. He demonstrates that the basic “rule” under which Christianity proceeded through the centuries is to be found in the principle of development, and he emphasizes that throughout the entire life of the Church this principle has been in effect and safeguards the faith from any corruption.

"The topics of church and state, religious toleration, the legal enforcement of religious practices, and religiously motivated violence on the part of individuals, have once again become burning issues. Pierre Bayle's Philosophical Commentary was a major attempt to deal with very similar problems three centuries ago. His argument is that if the orthodox have the right and duty to persecute, then every sect will persecute since every sect considers itself orthodox. The result will be mutual slaughter, something God cannot have intended." "Bayle has often been seen as a skeptic who blazed a philosophical path that Denis Diderot, David Hume, and other Enlightenment thinkers would follow. But his was a philosophical skepticism that did not exclude the possibility of religious faith, and Bayle himself was a Calvinist Christian." "Bayle's book was translated into English in 1708. The Liberty Fund edition reprints that translation, carefully checked against the French and corrected, with an introduction and annotations designed to make Bayle's arguments accessible to the twenty-first-century reader." --Book Jacket.