Then during the World Environment Day 1982, John Paul II said that Saint Francis' love and care for creation was a challenge for contemporary Catholics and a reminder "not to behave like dissident predators where nature is concerned, but to assume responsibility for it, taking all care so that everything stays healthy and integrated, so as to offer a welcoming and friendly environment even to those who succeed us." The same Pope wrote on the occasion of the World Day of Peace, January 1, 1990, the saint of Assisi "offers Christians an Example of genuine and deep respect for the integrity of creation ..." He went on to make the point that: "As a friend of the poor who was loved by God's creatures, Saint Francis invited all of creation – animals, plants, natural forces, even Brother Sun and Sister Moon – to give honor and praise to the Lord. The poor man of Assisi gives us striking witness that when we are at peace with God we are better able to devote ourselves to building up that peace with all creation which is inseparable from peace among all peoples."