What role did church fathers like St. Basil and St. John Chrysostom play in the ecumenical councils?

Church fathers like St. Basil and St. John Chrysostom played crucial roles in the ecumenical councils by contributing to theological debates and decisions. Their involvement was instrumental in addressing key doctrinal issues that affected the early Church and its understanding of Christian faith and practice.

St. Basil, for example, was a significant figure in the development of Trinitarian theology, particularly in the fight against Arianism, which denied the full divinity of Jesus Christ. His writings and participation in discussions helped clarify the Church's position on the nature of God and the relationship between the Father, Son, and Holy Spirit. St. John Chrysostom, renowned for his eloquent preaching and moral teachings, also influenced theological discussions, particularly regarding the interpretation of Scriptures and the governance of the Church.

Through their teaching, writings, and participation in various councils, these church fathers helped shape the foundational doctrine of Christianity that would guide the Church for centuries to come. Their theological contributions were vital in establishing a unified understanding of Christian beliefs among diverse Christian communities.