I imagine you know quite a few people who do not believe in God. How do you answer them? Where do you begin?  The first thing I want to say is that when you encounter someone who doubts the existence of God realize that it is not your responsibility to convince them or win the argument. That is the work of the Holy Spirit.  Since God is not visible to the human eye, there can be no direct physical proof of him. However, God has provided ample evidence of his existence and character both in the created world and in the unique nature of human beings. Above all he has given a perfect and sufficient revelation of himself in the person of his Son, Jesus Christ. Besides these evidences, there is the witness of the Bible and the prophecies God placed in it which have come true. Finally there is the testimony of the Church. Today one quarter of the world’s population claim to follow Jesus Christ. Ironically, the Church is growing fastest where the persecution and opposition is the most intense. Let make some observations before we look at Psalm 19 our reading for today. First observation: Because of our fallen nature it is natural for people to doubt the existence of God.