During a GENERAL AUDIENCE on 27 January 2010 in Paul VI Audience Hall, Pope Benedict XVI elaborates on St. Francis of Assisi. The following is an except, you can access the entire text here.
“From love for Christ stems love for others and also for all God’s creatures. This is yet another characteristic trait of Francis’ spirituality: the sense of universal brotherhood and love for Creation, which inspired the famous Canticle of Creatures. This too is an extremely timely message. As I recalled in my recent Encyclical Caritas in Veritate, development is sustainable only when it respects Creation and does not damage the environment (cf. nn. 48-52), and in the Message for the World Day of Peace this year, I also underscored that even building stable peace is linked to respect for Creation. Francis reminds us that the wisdom and benevolence of the Creator is expressed through Creation. He understood nature as a language in which God speaks to us, in which reality becomes clear, and we can speak of God and with God.
Dear friends, Francis was a great Saint and a joyful man. His simplicity, his humility, his faith, his love for Christ, his goodness towards every man and every woman, brought him gladness in every circumstance. Indeed, there subsists an intimate and indissoluble relationship between holiness and joy. A French writer once wrote that there is only one sorrow in the world: not to be saints, that is, not to be near to God. Looking at the testimony of St Francis, we understand that this is the secret of true happiness: to become saints, close to God!” -Pope Benedict XVI