As a convert, one of the things that attracted me to the Catholic Faith was its strong grounding in the physical world. Catholic teaching on the Real Presence, the Sacraments, and sacramental objects offered me a faith grounded in the real world, where Jesus wasn’t just a memory we commemorated through symbolism or a spiritual presence living invisibly in our hearts. No, for Catholics, he is flesh and blood, physically present all over the world in the Eucharist, and his grace is a tangible thing. Baptism, Confession, Communion, Confirmation, Marriage, Ordination, the Anointing of the Sick—these Sacraments are not...