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When debating whether to maintain Lenten Eve (Fat Tuesday), Epiphany (when the wise men saw the Christ child), and other Roman Catholic holidays or to radically abolish them, some people may say yes and others no. However, the godly immediately know the right way, for they understand that Roman Catholic holidays have no basis in Holy Scripture and that regular observance of them offers occasion for much sin. These celebrations cause great disorder in the places or homes where they are observed and become a stumbling block to real holiness as they strengthen the old man. The godly swiftly conclude that Reformed Christians who would gladly abolish or ignore the feast days have the truth on their side. Again, this rule may be applied to countless other situations in life.
Willem Teellinck, The Path of True Godliness, ed. Joel R. Beeke, trans. Annemie Godbehere, Classics of Reformed Spirituality (Grand Rapids, MI: Reformation Heritage Books, 2003), 101.