“Commandments of men”
Consider Matthew 15:6–9, which Fundamentalists and Evangelicals often use to defend their position: “So by these traditions of yours you have made God’s laws ineffectual. You hypocrites, it was a true prophecy that Isaiah made of you, when he said, ‘This people does me honor with its lips, but its heart is far from me. Their worship is in vain, for the doctrines they teach are the commandments of men.’” Look closely at what Jesus said.
He was not condemning all traditions. He condemned only those that made God’s word void. In this case, it was a matter of the Pharisees feigning the dedication of their goods to the Temple so they could avoid using them to support their aged parents. By doing this, they dodged the commandment to “Honor your father and your mother” (Ex. 20:12).
Elsewhere, Jesus instructed his followers to abide by traditions that are not contrary to God’s commandments. “The scribes and the Pharisees sit on Moses’ seat; so practice and observe whatever they tell you, but not what they do; for they preach, but do not practice” (Matt. 23:2–3).
What Fundamentalists and Evangelicals often do, unfortunately, is see the word “tradition” in Matthew 15:3 or Colossians 2:8 or elsewhere and conclude that anything termed a “tradition” is to be rejected. They forget that the term is used in a different sense, as in 1 Corinthians 11:2 and 2 Thessalonians 2:15, to describe what should be believed. Jesus did not condemn all traditions; he condemned only erroneous traditions, whether doctrines or practices, that undermined Christian truths. The rest, as the apostles taught, were to be obeyed. Paul commanded the Thessalonians to adhere to all the traditions he had given them, whether oral or written.
The Indefectible Church
The task is to determine what constitutes authentic tradition. How can we know which traditions are apostolic and which are merely human? The answer is the same as how we know which scriptures are apostolic and which are merely human—by listening to the magisterium or teaching authority of Christ’s Church. Without the Catholic Church’s teaching authority, we would not know with certainty which purported books of Scripture are authentic. If the Church revealed to us the canon of Scripture, it can also reveal to us the “canon of Tradition” by establishing which traditions have been passed down from the apostles. After all, Christ promised that the gates of hell would not prevail against the Church (Matt. 16:18) and the New Testament itself declares the Church to be “the pillar and foundation of the truth” (1 Tim. 3:15).
NIHIL OBSTAT: I have concluded that the materials presented in this work are free of doctrinal or moral errors. Bernadeane Carr, STL, Censor Librorum, August 10, 2004
IMPRIMATUR: In accord with 1983 CIC 827 permission to publish this work is hereby granted. +Robert H. Brom, Bishop of San Diego, August 10, 2004
Information taken from Catholics Answers