CCC 1147

God speaks to man through the visible creation. the material cosmos is so presented to man's intelligence that he can read there traces of its Creator. Cf. Wis 13:1; Rom 1:19f; Acts 14:17. Light and darkness, wind and fire, water and earth, the tree and its fruit speak of God and symbolize both his greatness and his nearness.

Read the full chapter 2. The Sacramental Celebration of the Paschal Mystery ¶1135–1209