(a) If by increase is meant the addition through new revelation of main beliefs not contained in the primitive revelation, there has never been an increase in the articles of faith; for from the beginning God made known His own being, which includes the eternal things of God and the end or happiness of man, and His providence, which includes the temporal dispensations of God and the means for the salvation of man (Heb., xi. 6). (b) If by increase is meant the addition of new revelations that brought out more clearly and definitely things contained in previous revelation, there was an increase in the articles of faith from the beginning of revelations down to the end of the Apostolic age. Thus, the nature of God and His purpose as regards the redemption of humanity were brought out ever more distinctly by new revelations in Old Testament times (Exod., vi. 2), and were given in final and complete form by the revelation of Christ (Heb., i. 1; Eph., iii. 5; Heb., xii. 27, 28; II Tim., i. 13). (c) If by increase is meant a clearer and fuller explanation of the revelation once delivered to the Saints, there has been and always can be an increase of articles of faith. Thus, in the Council of Nicaea the Apostles’ Creed was amplified; in the Council of Constantinople the Creed of Nicaea was added to, and similarly today or tomorrow the Pope could add new explanations or developments to the Creed, if new heresies or necessities required that the true sense of revelation already given should be brought out more clearly or fully. 769. There are three principal Creeds used by the Church: (a) the Apostles’ Creed, which according to an early tradition was composed by the Apostles themselves before they separated to preach the Gospel. It was in use from the first centuries in the Roman Church, which required that the catechumens learn and recite it before receiving Baptism. It is divided into twelve articles; (b) the Nicene Creed, which is used in the Mass and was drawn up at the Council of Nicaea (325) against the Arian denial of the divinity of Christ, and was revised by the Council of Constantinople (381) against the Macedonians, who refused to acknowledge the divinity of the Holy Ghost; (c) the Athanasian Creed, which is used in the Office of Prime and is a resume of the teaching of St. Athanasius on the Trinity and Incarnation. It was composed in the West some time after the beginning of the fifth century.