Non-Catholics have a problem with “tradition” because they fail to make a distinction between “tradition” (small t) which are changing, non-essential customs and practices, and “Tradition” (large T), which is part of the unchanging deposit of the Faith, which along with Sacred Scripture, makes up Divine Revelation. From the Catholic Answers tract, "Scripture and Tradition:
What is Tradition?
In this discussion it is important to keep in mind what the Catholic Church means by Tradition. The term does not refer to legends or mythological accounts, nor does it encompass transitory customs or practices which may change, as circumstances warrant, such as styles of priestly dress, particular forms of devotion to saints, or even liturgical rubrics. Sacred or Apostolic Tradition consists of the teachings that the apostles passed on orally through their preaching. These teachings largely (perhaps entirely) overlap with those contained in Scripture, but the mode of their transmission is different.
They have been handed down and entrusted to the Church. It is necessary that Christians believe in and follow this Tradition as well as the Bible (Luke 10:16). The truth of the faith has been given primarily to the leaders of the Church (Eph. 3:5), who, with Christ, form the foundation of the Church (Eph. 2:20). The Church has been guided by the Holy Spirit, who protects this teaching from corruption (John 14:25-26, 16:13).
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