The Gnostics, the Montanists, and the Manichaeans. 
The early heresies numerous, 429
The systems with which Christianity had to struggle, 430
The leading peculiarities of Gnosticism, ib. 
The Aeons, the Demiurge, and the Saviour, 431
Saturninus, Basilides, and Valentine, 433
Marcion and Carpocrates, ib. 
Causes of the popularity of Gnosticism, and its defects, 434
Montanus and his system, 436
His success and condemnation, 437
Mani and his doctrine of the Two Principles, 438
The Elect and Hearers of the Manichaeans, 439
Martyrdom of Mani, 440
Peculiarities of the heretics gradually adopted by the
    Catholic Church, 441
Doctrine of Venial and Mortal Sins, ib. 
Doctrine of Purgatory, 442
Celibacy and Asceticism, 443

CHAPTER V.

THE DOCTRINE OF THE CHURCH

Leading doctrines of the gospel still acknowledged, 445 Meaning of theological terms not yet exactly defined, ib.  Scripture venerated and studied, 446 Extraordinary scriptural acquirements of some of the
    early Christians, 447
Doctrine of Plenary Inspiration of Scripture taught, 448 The canon of the New Testament, ib.  Spurious scriptures and tradition, 449 Human Depravity and Regeneration, 450 Christ worshipped by the early Christians, 451 Christ God and man, 452 The Ebionites, Theodotus, Artemon, and Paul of Samosata, 453 Doctrine of the Trinity, 454 Praxeas, Noetus, and Sabellius, 455 Doctrine of the Trinity not borrowed from Platonism, 457 The Atonement and Justification by Faith, 458 Grace and Predestination, ib.  Theological errors, 459 Our knowledge of the gospel does not depend on our proximity to
    the days of the Apostles, 461