Today we celebrate the great and central mystery of our Catholic Church the Feast of the Most Holy Trinity: One God in three persons.

How can it be possible that in one Being there are three persons yet remain one? This question is always and will remain a challenge for us believers. Because of this, we use objects and analogies from daily life even if they are inadequate to describe the mystery of the Holy Trinity. St. Patrick of Ireland, for example, used Shamrock to illustrate the Trinity. Many preachers today will use images like fire (flame, heat, and light); family (father, mother and a child); 1x1x1=1; and many more to give us a glimpse of the mystery of our God. Whatever the illustration the preacher will use the point is each of these three persons has his own unique existence and purpose yet they are related to each other. They form one being and that is God.

The best explanation for me on the Trinity is in the Athanasian Creed. It says, "This is the Catholic faith. We worship one God in the Trinity and the Trinity in unity, without either confusing the persons or dividing the substance; for the person of the Father is one, the Son is another, the Holy Spirit is another, but the Godhead of the Father, Son, and Holy Spirit is one, their glory is equal, their majesty is coeternal." Therefore, our God as Trinity is our creator, Saviour, and life giver.

According to Catherine Mowry LaCugna "the doctrine of the Holy Trinity uses the idea of 'person' and 'relation' to affirm that God is essentially personal and relational, the doctrine of the Trinity is also the foundation for a theology of human person, and theology of right relationship".  Because God is personal and not impersonal, God exists as the mystery of persons in communion. Communion comes from the Greek word koinonia which means shared life. Persons who exist together in true communion share hope, joy, suffering and many more. Therefore, through communion, the "I to I perspective" is challenged and asked to adopt the more inclusive and more selfless "I- and God- and Neighbor" principle. We become Trinitarian believer only when we adopt this principle in our lives. We become human when we relate to others. We become the image and likeness of God when we engage ourselves to the day to day life of our neighbors.

Today the secular world celebrates the Father’s Day. Imitating the Holy Trinity may our fathers be creative and productive like God the Father; may they become reconcilers and peacemakers like Jesus Christ; may they be like the Holy Spirit who is a good teacher and guide to their children.