Drove all the snakes out of Ireland. Used a three-leaf clover to demonstrate the concept of the Holy Trinity. Brought the Holy Gospel to heathen celts struggling in darkness. Led to the establishment of God's holy church on the Emerald Isle.
And what do we do in his honor every March 17?
Do we drive snakes? Teach the Trinity? Convert the heathen? Establish churches?
Of course not. That's for the rest of the year. Today, we remember the accomplishment of St. Patrick and missionaries everywhere, and celebrate them. (And it breaks up Lent pretty nicely, too.)
Happy St. Patrick's Day, everyone.