- Jul 16, 2025
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The Catechism of the Catholic Church says that the mystery of the Holy Trinity is “the central mystery of Christian faith and life” and “the most fundamental and essential teaching.”1 But how can fallen human beings hope to comprehend “a mystery that is inaccessible to reason alone”?2 For those who do not delight in reading theological textbooks, a recently canonized saint offers a practical guide to the truth of Trinitarian theology.