During their Introductory Periods the two movements tried to draw together under the influence of the philosophical eclecticism which colors this time. In their Development Periods the two movements draw apart, become closed and mutually repellent. The historical developments of the two movements from beginning to end are very different. The tide of Hellenism floods with Plotinus, its greatest representative, and after him there is a gradual ebb. On the other hand, Christianity shows a continuous growth, both internally and externally, and the mighty Origen only points to the mightier Augustine. Both movements finally merge in Augustine. I. Hellenic Religious II. Christianity. Philosophy. 1. Introductory Period Introductory Period (100 B. C.–250 A. D.). (31 A. D.–200 A. D.). (1) Greek-Jewish philosophy (1) Period of simple faith (until of Alexandria. the 2d century A. D.). Philo (25 B. C.–50 A. D.). (2) Neo-Pythagoreanism (2) Period of Earlier Formulation (100 B. C.–150 A. D.). of Doctrine. Apologists (2d century). Gnostics (2d century). Old Catholic Theologians (2d and 3d centuries). 2. Development Period Development Period (200–476). (250–476). Neo-Platonism. (1) Period of Actual Formulation Plotinus (204–269). of Doctrine. Jamblichus (d. 330 about). The School of Catechists. Proclus (410–485). Origen (185–254). (2) The Œcumenical Councils and the establishment of dogma. =The Hellenic Religious Philosophies.= Alexandria and not Athens was now the intellectual centre of Hellenism. The position and history of the city, as well as the character of its population, were most favorable for the mingling of religions and philosophies. In the “university” of this great commercial metropolis the treasures of Greek culture were concentrated and scholastic work was vigorously pursued. Here all philosophies met, and all religions and cults were tolerated. Exhausted Greek philosophy here came in contact with those fresh Oriental ideas which previously, at a distance, had excited the imagination of the Greeks as something mysterious. The result was a new phase of philosophy,――theosophy, comparative religion, or eclecticism of philosophy and religion.