When we believe in Jesus for our salvation and obey His command to proclaim His word, we will be amazed at what God will do to confirm His message.
There was a before and after story with Jesus. He was crucified and is risen. By accepting Him as our savior, God gives us a before and after story. Before we were children of Adam and Eve, on our way to eternal death and after we are children of God living in eternal life.
Jesus went to the cross to take the punishment of sin for all of us. His work on the cross is the only means of which man can be saved. If we accept this by faith we inherit eternal life.
Jesus followed His calling at any cost. As His followers we need to do the same.
We have all walked away from God or denied His authority by our actions at times. But, if we confess our sin to Him and turn from it, He will forgive and restore us. No matter how awful our past, how broken our heart, Jesus extends His hand to us in love. All we need to do is accept it.