The Life and Teaching of Jesus.—Hans Heinrich Wendt, The Teaching of Jesus (1892), 2 vols.; Oskar Holtzmann, The Life of Jesus (Eng. trans., 1904); Paul Wernle, Beginnings of Christianity, 2 vols. (1903-1904); T. Crawford Burkitt, The Gospel History and its Transmission (1906).
The Beginnings of Christianity.—Ernst von Dobschütz, Christian Life in the Primitive Church (Eng. trans., 1904); A.C. McGiffert, The Apostolic Age (1900); Carl Weizsäcker, The Apostolic Age (Eng. trans., 1897); Otto Pfleiderer, Das Urchristentum (1902).
The Expansion of Christianity.—Edwin Hatch, “The Influence of Greek Ideas and Usages upon the Christian Church,” the Hibbert Lectures, 1888 (1890); Adolf Harnack, The Expansion of Christianity in the First Three Centuries (Eng. trans., 1904); Sir W.M. Ramsay, The Church in the Roman Empire (1893).
The History of Church and of Dogma.—Adolf Harnack, History of Dogma (Eng. trans., 1895); Reinhold Seeberg, Lehrbuch der Dogmengeschichte (1895, 2 vols.); Philip Schaff, The Creeds of Christendom (3 vols., 1881, 3rd ed.).
The Roman Church.—Joseph Wilhelm and Thomas B. Scannell, Manual of Catholic Theology (1906); J.A. Moehler, Symbolism (trans. 1844); Thomas Aquinas, The Summa (Eng. trans., 1907); William Ward, The Ideal of a Christian Church (1844).
The Greek Church.—“The Creeds of the Greek and Russian Churches,” in Schaff, Creeds, vol. ii. pp. 275-542; and J. Michalcesu, Die Bekenntnisse und die wichtigsten Glaubenszeugnisse der griechisch-orientalischen Kirche (Leipzig, 1904).
Protestantism.—John Calvin, Institutio Religionis Christianae, (1536; Eng. trans., 1816); Charles Hodge, Systematic Theology (3 vols., 1872); Ernst Troeltsch, Die Absolutheit des Christentums und die Religionsgeschichte (1902); First Principles of the Reformation, or the Ninety-five Theses and the Three Primary Works, trans. by Henry Wace and C.A. Buchheinz (1883).
Christianity in the Modern World.—Andrew D. White, Conflict of Science with Theology (2 vols., 1896); D.F. Strauss, Der alte und der neue Glaube (1872; Eng. trans., 1873); A.J. Balfour, The Foundations of Belief (1897); J. Ward, Naturalism and Agnosticism (1899).
Modern Adaptations of Christianity.—William Adams Brown, Christian Theology in Outline (1906); Augustus Sabatier, Religions of Authority and the Religion of the Spirit (1904); J.A. Zahm, Evolution and Dogma (1896); John Henry Newman, An Essay on the Development of Christian Doctrine (1845); Edward Caird, The Evolution of Religion (1893); Otto Pfleiderer, Philosophy of Religion (Eng. trans., 1888, especially volumes 3 and 4); Newman Smyth, Old Faiths in New Lights (1879), Through Science to Faith (1902); Henry Drummond, The Ascent of Man (1894); William Ralph Inge, Christian Mysticism (Bampton Lectures, 1894); Wilhelm Herrmann, The Communion of the Christian with God (1895); George William Knox, Direct and Fundamental Proofs of the Christian Religion (1903); Albrecht Ritschl, Die christliche Lehre von der Rechtfertigung und Versöhnung (1900).
Modern Definitions of Christianity.—Alfred Loisy, The Gospel and the Church (1904); Adolf Harnack, What is Christianity? (1901); William Adams Brown, The Essence of Christianity (1902); Ernest Troeltsch, Das Wesen des Christentums; J. Kaftan, Das Wesen der christlichen Religion (2nd ed., 1888); J. Caird, The Fundamental Ideas of Christianity (1899).