The One Thing is Three: How the Most Holy Trinity Explains Everything

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  • The One Thing is Three: How the Most Holy Trinity Explains Everything
  • By the author of 33 Days to Morning Glory
  • Written in an easy, accessible style
  • A beautiful way to draw near to an incredible mystery

With humor and ease, Father Michael Gaitley, MIC, deftly unlocks the "one thing," the key to the Church's wisdom, and the greatest mystery of the Catholic faith: the Most Holy Trinity. Far from being a scholarly or academic read, The "One Thing" is Three makes deep theology accessible to every-day Catholics. What's more, it makes even what's familiar or forgotten appear in a way that's new, exciting, and relevant. Thus, The "One Thing" is Three brings its readers a unique and powerful experience of the faith. 


"Fr. Michael Gaitley, MIC, has a holy passion not only to contemplate the truth and beauty of the Trinity but to communicate it, which he does here with practical wisdom and spiritual insight. Readers will gain a new understanding and appreciation of the mysteries of faith, based on what the Church teaches about the highest and holiest Mystery of all: 'The communion of the Holy Trinity is the source and criterion of truth in every relationship' (CCC, n. 2845). Both inspiring and illuminating, I highly recommend this book."
Scott Hahn, Ph.D. --Author, Speaker, Professor of Theology and Scripture, Franciscan University of Steubenville

"This is a beautiful book of Catholic teaching with personal stories and practical instruction that can easily be applied to everyday life, especially in this Year of Faith."
Teresa Tomeo
A Syndicated Catholic Talk Show Host, Bestselling Catholic Author, Motivational Speaker


About the Author: Father Michael Gaitley, MIC was ordained to priesthood Saturday, October 16, 2010. Father Michael holds a Masters Degree in Theology, and a Licentiate Degree in Spiritual Theology. 


  • 5 1/2 x 8 1/2 inches

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  • 5 Mar 15th 2016
    The "One Thing is Three"

    I have not quite finished it yet, but so far, it is compelling and easy to read and learn from.

    Lisa Herrera

  • 5 Jun 19th 2014

    As soon as I finished this book, I was ready to begin it again-mostly because I know I didn't begin to absorb all the ideas contained therein. Even so, my copy is dog-eared. I have carried it everywhere these past few weeks: to Mass almost every day; to Adoration; it even went to Houston with me last week-end when I moved my daughter there. However before I reread it, I will be taking Fr. Gaitley's recommendations about the writings of Sts. John Paul II and John Henry Newman. Maybe in that way,

    cathy lees

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