“The Church of Christ determined the truths of the Faith, according to the long course of Tradition, through the teachings and canons of the holy Ecumenical Councils, decrees and the Symbol of Faith [The Creed], and by confessions [of Faith] made by holy and wonderworking hierarchs at the many local synods which have been held continuously since days of old. At these synods, the authenticity and genuineness of the holy Orthodox Faith was firmly established”
(Elder Cleopa+ in ‘the Truth of Our Faith’)