[St. Francis] looked upon creation with the eyes of one who could recognize in it the marvelous work of the hand of God. His solicitous care, not only towards men, but also towards animals is a faithful echo of the love with which God in the beginning pronounced his 'fiat' which brought them into existence. We too are called to a similar attitude.
Pope John Paul IIFrom now on it is only through a conscious choice and through a deliberate policy that humanity can survive.
Pope John Paul II