I recently heard someone ask the question, “What is the central mystery of the Catholic faith?” The answer, of course, is the Holy Trinity. Today we celebrate and contemplate that mystery. Let us enter in to the readings and commentary in the spirit of mystery and faith, and find the treasures God intends for us this day.

Note that Scripture readings are from the Lectionary for Mass for Use in the Dioceses of the United States of America, second typical edition, Copyright Confraternity of Christian Doctrine, Inc., used with permission. Commentary copyright Peter Kreeft, published by Word on Fire, used with permission.