The Solemnity of the Holy Trinity doesn’t often incite the same excitement as Christmas or Easter. Somehow, we feel those wonderful mysteries of our faith are more tangible and relatable than doctrine of the Trinity. The Trinity, however, provides practical meaning for our lives and a model for the love and generosity we are called to share with those around us.
With this doctrine, God has revealed to us that he is not infinite loneliness, but infinite love, infinite relationship of self-giving. The one divine nature exists fully and simultaneously in three divine Persons, the Father, the Son, and the Holy Spirit. Sometimes we catch a glimpse of how wonderful this doctrine really is, but even so, it still seems kind of abstract, something for theologians to ponder, something impractical for everyday Christians. This idea could not be further from the truth.
The Trinity is actually the most practical of all Christian doctrines, because it reveals the meaning of our life. We are created in God's image and God, in the very essence of his being, is self-forgetful love, a harmonious relationship in which the three divine Persons are knowing each other and giving to each other. God's eternal, dynamic happiness flows from the Trinity’s communion of love and so, our happiness, since we are created in his image, will flow from the same thing, from our freely choosing to use our God-given gifts - life, talents, resources - to build up those around us.
This is what we are created to be and to do, and only in this will we find the happiness we long for. The meaning of life is for us to choose every day, in the little things and the big things, to be better mirrors of the Trinity.
Pope Benedict put it like this: "All beings are ordered to a dynamic harmony that we can similarly call 'love.' But only in the human person, who is free and can reason, does this dynamism become spiritual, does it become responsible love, in response to God and to one's neighbor through a sincere gift of self. It is in this love that human beings find their truth and happiness” (Benedict XVI, Angelus, 11 June 2006).
Only when we understand we were created to mirror the Trinity can we begin to grasp the true meaning of human life. This task of mirroring the Trinity isn't something we can simply finish and check off our to-do list. Rather, it's an ongoing thing; it's the adventure of a lifetime; it is meant to be our life's work. It unifies all the other parts of our lives, because it gives them purpose.
A nurse mirrors the Trinity in striving day after day for excellence in nursing. Likewise for the teacher, athlete, politician, plumber, and business leader. But most of all, each one of us is called to show and grow this self-forgetful love in our family.
Pope Benedict actually called the family an "analogy of the Trinity.” Family life isn't just an extra feature or a pre-requisite for other things. It is meant to be the primary place where we discover and fulfill this deep meaning of our lives.
Here is how the pope puts it: "Among the different analogies of the ineffable mystery of the Triune God that believers are able to discern, I would like to cite that of the family. It is called to be a community of love and life where differences must contribute to forming a 'parable of communion'" (Benedict XVI, Angelus, 11 June 2006).
The happiness each one of us thirsts for can be achieved only if we fulfill the meaning God built into our human nature. And the primary place to play this role is family life; it provides more opportunities for mirroring the Trinity than any other sector of living. The more we learn to practice self-forgetful love (patience, forgiveness, selfless service) there, the more our souls will become a bright, clear mirror of the heart of God.