If God had wanted to, he could have taken you directly to heaven the moment you trusted Christ as Savior. But he didn’t, which means that he left you on the earth for a particular purpose. Read that last sentence again because it contains a vital truth you need to know. What is it that God left you on earth to do? When you think about it, there is one main thing you can do on earth that you will never have to do in heaven: You can tell a lost sinner about Jesus Christ.  God uses people like us to convince other people like us to believe in him. We are God’s witnesses to convince an unbelieving world.