Faith in Jesus Name

Acts 3:16

And on the basis of faith in His name, it is the name of Jesus which has strengthened this man whom you see and know; and the faith which comes through Him has given him this perfect health in the presence of you all.

Peter was super clear when he preached an impromptu sermon after he had healed the lame man.  The man was strengthened by the name of Jesus, not by the name of Peter. Faith in Jesus name. 

Peter's message and our message are the same; we preach faith in Jesus name. It's a pretty simple message really.