By Dr. Donald DeMarco, Catholic Exchange - Archbishop Fulton J. Sheen has answered this question once and for all time in his 336-book, Those Mysterious Priests. It is my task, in this brief article, to provide a snapshot of what the Venerable Sheen has said, in a relatively brief exegesis. First of all, we may answer the easier question, “Why does Sheen refer to priests as mysterious?” It is because they are “amphibious.” That is to say, that they live in two worlds, at once human and divine. “No life is more adventurous,” the good bishop points out, “for at every moment, like the trapeze artist, he is swinging between time and eternity.”