1 John2:6

Whoever says he lives in Christ (that is, whoever says he has accepted Him as God and Savior) ought (as a moral obligation) to walk and conduct himself just as He walked and conducted Himself.  

Jesus came to this earth to set us free from sin and death! By doing this, Jesus opened the door for us to gain His authority and power over Satan. We do this by reading and following His example from the Bible and listening to the Holy Spirit. Jesus prayed, spoke to sin and sickness, and used His authority here on earth, which means we can too.