But simple as the Sign of the Cross is, it carries a brave weight: it names the Trinity, celebrates the Creator, and brings home all the power of faith to the brush of fingers on skin and bone and belly. So do we, sometimes well and sometimes ill, labor to bring home our belief in God's love to the stuff of our daily lives, the skin and bone of this world — and the Sign of the Cross helps us to remember that we have a Companion on the road.

Simple, powerful, poignant, the Sign of the Cross is a mnemonic device like the Mass, in which we sit down to table with one another and remember the Last Supper, or a baptism, where we remember John the Baptist's brawny arm pouring some of the Jordan River over Christ. So we remember the central miracle and paradox of the faith that binds us each to each: that we believe, against all evidence and sense, in life and love and light, in the victory of those things over death and evil and darkness.