Select By
View By

The One Thing is Three (Evangelization Edition)

Fr. Michael Gaitley

The 'One Thing' is Three is written for everyone. The conversational tone has an appeal that invites the reader into the journey of life. I highly recommend this book for anyone who loves the Church and seeks a deeper understanding of her teachings. Filled with references to Vatican II and Pope John Paul II, this book will enrich your belief in God's plan of salvation, and your love of the Most Holy Trinity.

Pages: 364
Book Dimensions: 5.5" x 8.5"

In the Evangelization Edition, Appendix Two has been removed. The main content of the book remains unchanged.

Dr. Peter Kreeft, PHD: "WARNING: This book is dangerous. It brims with wisdom and wonder, and with enthusiastic and infectious joy. This is the very best example I have ever seen of the "New Evangelization" in the form of a book for contemporary Catholics."

Average Rating: 4.80 based on 5 ratings
You must login to rate this item.

  • Parish Pricing

    We are pleased to offer parish pricing on this item. If you are already set up to order on behalf of a parish, please log in and select “PARISH” at the top right hand corner of the website.

    To get set up to place parish orders with Parish Access, contact your Parish Consultant or call Customer Service at 866-767-3155.

Other Recommended Titles

Wisdom & Works of Mercy Participant Packet (WITHOUT book)

Wisdom & Works of Mercy Participant Packet (WITHOUT book)

This Participant Packet for Stage Two of the Hearts Afire Program is the ideal packet for those who would like to join a Wisdom and Works of Mercy Small Group Study, yet already have the book The 'One Thing' Is Three. Each item in this packet was thoughtfully chosen as an aid to bring participants deeper into the Catholic faith and the works of mercy.

Click the image to the left to enlarge and see all kit contents.

Please note: The book for this study, The 'One Thing' Is Three, is not included in this kit. Click here to order it now.

The following items are included:

- Wisdom and Works of Mercy: A Two-in-One Retreat Companion
- "Three Points of Communion" prayer card
- 10 Divine Mercy business card-sized prayer cards
- CD with a dramatic reading of the "Farewell Discourse" from The Gospel According to John
- Full-color bookmark with reading assignments
- You Did It To Me: A Practical Guide to Mercy in Action (book by Fr. Gaitley)


Bible Basics for Catholics

Bible Basics for Catholics

From biblical scholar Dr. John Bergsma — two-time "Teacher of the Year" from Franciscan University of Steubenville, OH — comes this fresh, fun, and authentically Catholic introduction to the "big picture" of salvation history.

This overview of the Bible is based on Bergsma's widely popular introduction to theology course at Franciscan University of Steubenville. Bergsma combines sound theology, academic expertise, pastoral wisdom, and an endearing playfulness to draw readers into the connection between the great stories of the Bible and salvation in Jesus.


Praise for Bible Basics for Catholics:

"You will come to see the Bible in a whole new light, and find yourself reading it — with greater wisdom and insight — for the rest of your life."
- From the Foreword by Dr. Scott Hahn

Pages: 185
Book Dimensions: 5.25" x 8"


what an easy to read and inspiring book, fanning the flame of my love of scripture. xanthe - Salisbury, Wilts

The Fourth Cup

The Fourth Cup

Well-known Catholic theologian Dr. Scott Hahn explains Christ's Paschal Sacrifice on the cross as the fulfillment of the traditional fourth cup used in the celebration of the Jewish Passover meal. He draws a symbolic parallel to the Last Supper and Christ's death on Calvary. Through his scholarly insights and important biblical connections, Mass will come alive for you as never before!


Thank you! This put all the pieces of the puzzle together concerning the Holy Eucharist. The Mass has come alive for me and my family! Joe - Kettering, OH

The Divine Mercy Image Explained - Booklet

The Divine Mercy Image Explained - Booklet

Learn the amazing story behind The Divine Mercy Image in this information and accessible booklet from the Marian Father of the Immaculate Conception. These inspiring truths about the Divine Mercy Image show the hey elements of the Image with remarkable depth and beauty.


Saint John Paul The Great - Book

Saint John Paul The Great - Book

A French novelist once wrote, “Tell me what you love, and I will tell you who you are.” Although there are countless ways to study Saint John Paul the Great, the most direct route is by entering the man’s heart.

Discover the five greatest loves of Saint John Paul II, through remarkable unpublished stories about him from bishops, priests who organized his papal pilgrimages, his students in Poland, Swiss Guards, and others. Mining through a mountain of papal resources, Jason Evert has uncovered the gems and now presents the Church a treasure chest brimming with the jewels of the saint’s life. Rekindle your own faith by learning what (and who) captivated the heart of this great saint.


"This book has provided me with spiritual insights that I am certain will stay with me for years to come. I highly recommend it every chance I get!" Tim - Downer's Grove. IL

Customer Comments

WARNING: This book is dangerous. It brims with wisdom and wonder, and with enthusiastic and infectious joy. This is the very best example I have ever seen of the "New Evangelization" in the form of a book for contemporary Catholics. Dr. Peter Kreeft-Boston, MA
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-Franciscan University
This book is packed with deep theological insight, and while bursting with information, it is written from the heart and speaks to the heart in such a way that the reader is drawn into a greater realization about the nature, mission, and action of the Holy Trinity. Fr. Gaitley has given us a great guide to help us in our knowledge and, therefore, our love for God the Father, God the Son, and God the Holy Spirit. Bishop Daniel Jenky-IL
This is a beautiful book of Catholic teaching with personal stories and practical instruction that can easily be applied to everyday life. Teresa Tomeo
The "One Thing is Three" by Fr. Michael Gaitley is written for everyone...I highly recommend this book for anyone who loves the Church and seeks a deeper understanding of her teachings. Bishiop Ricken-Green Bay, WI