When God does a miracle somehow you have to respond. When God does things for you - maybe we don't deserve them and we can never really repay God but God really wants us to respond to them. He doesn't want us to stay the same. So, for us to respond to what God has done in our lives is probably the same way he would want anyone to do - "Just tell people what I've done for you and what you've seen and heard." That's what we're doing.