Protestant water flowing in Catholic aqueducts

Then I caught sight of a Catholic spy in the Protestant camp: a gold cross atop the pole of the church flag. Adoring Christ required using that symbol. The alternative was the froth. My gratitude to the Catholic Church for this one relic, this remnant, of her riches, was immense. For this good Protestant water to flow, there had to be Catholic aqueducts. To change the metaphor, I had been told that reliance on external things was a "crutch!" I now realized that I was a cripple. And I thanked the Catholic "hospital" (that's what the Church is) for responding to my needs.

Source: Peter Kreeft  -  Hauled aboard the Ark, http://www.peterkreeft.com/topics/hauled-aboard.htm
http://www.peterkreeft.com/topics/hauled-aboard.htm