Just a few weeks ago, I spoke at the annual convention of the G. K. Chesterton Society. The theme of the conference was St. Francis, since this year marks the one-hundredth anniversary of the publication of Chesterton’s classic book on the medieval saint. In the course of his presentation, Dale Ahlquist, the president of the society, drew our attention to Chesterton’s remark that, according to St. Francis, we should not see nature as our mother, but rather as our sister, since we have the same Father.