The Tradition here in question comes from the apostles and hands on what they received from Jesus' teaching and example and what they learned from the Holy Spirit. (The Catholic Church distinguishes Sacred Tradition from local customs that may be retained, modified or even abandoned.) As explained by Athanasius of Alexandria, "Let us look at the very tradition, teaching, and faith of the catholic church from the very beginning, which the Logos gave (edoken), the Apostles preached (ekeryxan), and the Fathers preserved (ephylaxan). Upon this the Church is founded (tethemeliotai)"(St. Athanasius, "First Letter to Serapion", 28)