The Holy Fathers of the Second Ecumenical Council defended the Orthodox Faith against devastating heresies that threatened the Church in the 4th century. Convened in Constantinople in 381 AD by Emperor Theodosius the Great, this council reaffirmed the Nicene Creed and proclaimed the divinity of the Holy Spirit against the Macedonian heresy.

In this powerful exploration of Church history, we examine the battles against Arianism, Semi-Arianism, Eunomianism, Apollinarianism, and other false teachings that attempted to distort the nature of Christ and the Holy Trinity.

Learn how the Fathers of the Church safeguarded Apostolic Christianity and completed the Nicene-Constantinopolitan Creed still proclaimed by Orthodox Christians today.

⚔️ Topics Covered:

The rise of Arian and Semi-Arian heresies
Macedonius and denial of the Holy Spirit
Eunomius and “different essence” theology
Apollinarianism explained
Emperor Theodosius and the Council of Constantinople
Completion of the Nicene Creed
Why Orthodox doctrine matters
The defense of the Holy Trinity

✝️ “That which has been believed everywhere, always, by everyone.” — St. Vincent of Lérins

#OrthodoxChristianity #NiceneCreed #SecondEcumenicalCouncil #ChurchHistory #HolyTrinity #Arianism #Orthodoxy #ChristianHistory #EasternOrthodox #Patristics #Saints #Theology #Constantinople #NiceneConstantinopolitanCreed #HolySpirit

00:00 Introduction to the Second Ecumenical Council
00:40 The Rise of Arianism After Nicaea
01:04 Macedonius and the Holy Spirit Heresy
01:51 Eunomius and “Different Essence” Theology
02:22 Other Heresies Threatening the Church
02:53 Apollinarianism Explained
03:09 Emperor Theodosius Convenes the Council
03:34 The Ambiguous “Sirmian Creed”
04:21 Why Truth Cannot Compromise With Heresy
04:51 The Divinity of the Holy Spirit Affirmed
05:11 Reaffirming the Nicene Creed
05:36 The Completion of the Nicene-Constantinopolitan Creed
06:00 Ecclesiastical Canons and Reception of Heretics
06:17 Conclusion

https://www.oca.org/saints/lives

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Orthodox Christianity, Second Ecumenical Council, Nicene Creed, Nicene Constantinopolitan Creed, Holy Trinity, Holy Spirit, Arianism, Macedonianism, Eunomianism, Apollinarianism, Church History, Eastern Orthodox, Orthodox Theology, Christian History, Constantine, Emperor Theodosius, First Council of Nicaea, Council of Constantinople, Orthodox Saints, Patristics, Early Church Fathers, Nicene Christianity, Heresies in Christianity, Orthodox Faith, Trinity Doctrine, Divinity of Christ, Divinity of the Holy Spirit, Ancient Christianity, Christian Doctrine, Byzantine Christianity, Orthodox Church, Traditional Christianity, Church Councils, Cappadocian Fathers, Saint Gregory Nazianzen, Saint Basil the Great, Saint Gregory of Nyssa