Did Luther say this? I am not certain but I like the sentiment: God speaks, and that word is written all over creation. Too often we seperate our lives of faith from the real world and the disconnect is apparant to others. It is a good thing to connect our faith in to the world sround us. The danger however, would be to simply to connect our faith to creation only, and neglect the word as we know it in scripture revealing Jesus to us. As much as we see the beauty God creates in the cosmos, God remains hidden outside the word, and too often we try to listen to God in the silence.
This Earth Day I think it would be a good idea to get outside, take notice of what you see and hear, and thank God for the majesty of it all. Yet it is also important as you see the pain and brokenness so present in our world to remember that God created this world good (Genesis 1) and has promised to make all things new (Revelation 21). That promise starts from the new life we have witnessed from the empty tomb of the crucifed one. And that really is – good news.