You never know what kind of homily you will get on Trinity Sunday or as I call it Bad Analogy Sunday. Still this time around my pessimism was not rewarded and I was treated to a rather good homily. One that started “Thomas Aquinas says.” He used the Analogy of the Family to good effect, which is also the analogy the Catechism uses (CCC 2205).
Being in the Diocese of St. Augustine, not surprisingly over the years, I have often been treated to the story of St, Augustine, the boy, and the seashell. As a Middle Ages legend it serves it purposes as a reminder that the Trinity is a mystery, but not anything beyond that.
I would rather hear St. Augustine’s analogy of the Trinity he used in his book Confessions.”
I speak of these three: to be, to know, and to will. For I am, and I know, and I will: I am a knowing and a willing being, and I know that I am and that I will, and I will to be and to know. Therefore, in these three, let him who can do so perceive how inseparable a life there is, one life and one mind and one essence, and finally how inseparable a distinction there is, and yet there is a distinction. Surely a man stands face to face with himself. Let him take heed of himself, and look there, and tell me. But when he has discovered any of these and is ready to speak, let him not think that he has found that immutable being which is above all these, which is immutably, and knows immutably, and wills immutably.
Just as long as you remember all analogies limp, and they are downright crippled when it comes to The Most Holy Trinity.
Although I find Frank Sheed’s explanation providing the most light as laid out in Theology and Sanity and Theology for Beginners.
The Lutheran Satire bit on St. Patrick’s Bad Analogies is pretty funny as a vehicle to go over common bad analogies. Although there is no evidence that St. Patrick ever actually used the Shamrock as an analogy for the Trinity.