Saint Patrick used the shamrock to teach the people of Ireland about the Holy Trinity. The Holy Trinity is the “The Father, and the Son, and the Holy Spirit”. The shamrock used to be acknowledged as a sacred image in Ireland during the pre-Christian years. Saint Patrick in his wisdom took the Shamrock and explained how the Trinity is One through the physical example of three leaves interconnected by the one stem. This shamrock illustration began the Christian teaching in Ireland of three persons and the one and only God. The Catechism defines the Trinity as the mystery of one God in three Persons: Father, Son, Holy Spirit. The revealed truth of the Holy Trinity is at the very root of the Church’s living faith as expressed in the Creed. The next time you see a Shamrock be reminded of the Holy Trinity and the teachings of Saint Patrick. Happy Saint Patrick’s Day!