What more does God need to do to reveal Himself to mankind? Nothing really. He has revealed Himself in nature, the beauty that we see all around us is evidence of His creative ability. How could all this have happened except by grand design? Beyond that, He has given us His holy word to teach us and instruct us in things eternal. The death and resurrection of the Lord Jesus Christ is the final proof of God's great love for us. How could we do less than give our lives without reservation to Him?