Mark Shea, Catholic Perennialist

"The Catholic faith is utterly unique—because it is so much like so many other religious and philosophical traditions," begins his excellent article — What Makes the Catholic Faith Unique? I'm reminded of what Henri-Marie Cardinal de Lubac said in Catholicism: Christ and the Common Destiny of Man:

To see in Catholicism one religion among others, one system among others, even if it be added that it is the only true religion, the only system that works, is to mistake its very nature, or at least to stop at the threshold. Catholicism is religion itself.

And Martin Mosebach noted that Nicolás Gómez Dávila recognized this true nature of "the Catholic Church, which he did not regard as simply one of several Christian confessions, but as the great collecting tank of all religions, as the heiress of all paganism, as the still living original religion."