In the first part of this series, I offered a “Naughty List” of preaching don’ts for Trinity Sunday. Below is the “Nice List” or “Thou Shalts” (or at least "shouldsts") for Trinity Sunday, along with some additional commentary.
The most dangerous day of preaching in the liturgical year is upon us: Trinity Sunday. The perennial danger is, of course, that the homily on this day becomes an occasion for trivializing or else utterly mystifying the faith into which Christians been baptized, the Creed we profess each week, and the Sign of the Cross with which we mark ourselves over and over again. Karl Rahner memorably quipped that if we dropped the doctrine of the Trinity, most Christians would not notice the difference. The typically bizarre to banal nature of preaching on “Trinity Sunday” tends to prove the point: the Trinity is reduced to something that must be mentioned once a year, but as if extraneous rather than absolutely central to the Christian faith.
“Do you have any questions I can answer for you before your Confirmation?” This is the standard question I ask my sophomores in high school to conclude their Confirmation interview. Typically, I get a quick “Nope, I don’t think so,” or “What time is rehearsal again?” But the young man sitting before me looked up seriously, “Well, yeah, actually, one small thing—Jesus is the Son of God, right? But he’s also God? I’m just a little confused by that whole thing.”