from a sermon by Pope St. Leo the GreatNot only His mercy, but his chesed which is often translated as loving-kindness, but which really doesn't seem to have a word or word chain in English that can encompass the fullness of the phrase. It is God's deep love that sustains all that is--His abiding concern for His creation is not the fondness of a watchmaker for his wares, but of a Father to His children, each of whom He loves as though an only child.
Dear friends, at every moment the earth is full of the mercy of God, and nature itself is a lesson for all the faithful in the worship of God. The heavens, the sea and all that is in them bear witness to the goodness and omnipotence of their Creator, and the marvelous beauty of the elements as they obey him demands from the intelligent creation a fitting expression of its gratitude.
If you are of a mind to read more, and there is much more worth reading, you can find the whole of the Office of Readings at Universalis.