Born in France in 1786, St. John Vianney is best known as the patron saint of priests, in large part thanks to his legendary dedication to the sacraments. But with a national relic tour bringing his uncorrupt heart to Los Angeles next week, what does his life mean for ordinary Catholics? On page 10, contributing editor Kathryn Jean Lopez invites readers to experience why spending time with the saint’s heart “has the power of making us like fish in water in the life of prayer.”