St. Christopher found a hermit who taught him all about Christ, the King of Kings. The hermit suggested that he spend his life in prayer and fasting, a thing which St. Christopher, a large and probably often hungry man found difficult, he objected. The hermit suggested he then find something else that would please Christ. St. Christopher offered to work at a nearby river, and help travelers across. The fording was dangerous and many with less strength people had drowned. The hermit advised St. Christopher this would please Christ.

One day, a child approached St. Christopher by the river and asked to be helped across. St. Christopher obliged. However, as he entered midstream, the river rose and the child's weight grew and became extremely heavy. It was only by great exertion that St. Christopher safely delivered the child to the other side.

When St. Christopher asked the child why he was so heavy, the child explained that He was the Christ and when St. Christopher carried Him, he also carried the weight of the whole world on his shoulders. The child then vanished.

The name "Christopher" means Christ-bearer, and may allude to the legend of the man carrying the Christ Child across the river. His Feast Day is July 25.

Christopher is one of the Fourteen Holy Helpers who are a group of saints venerated together in Catholic tradition because their intercession is believed to be particularly effective against specific diseases and dangers. Each saint is invoked for aid regarding particular ailments or needs. The Fourteen Holy Helpers are: Acacius, Barbara, Blaise, Catherine of Alexandria, Christopher, Cyriacus, Denis, Erasmus of Formia, Eustace, George, Giles, Margaret of Antioch, Pantaleon, and Vitus.