The enormously prolific Swiss Roman Catholic theologian Hans Urs von Balthasar (1905-1988) was marginalized during much of his life, but his reputation over time has only continued to grow. He was said to be the favorite theologian of John Paul II and is held in high esteem by Benedict XVI. It is not uncommon to hear him referred to as the great Catholic theologian of the twentieth century. In Balthasar: A (Very) Critical Introduction...