Luke 4:40

While the sun was setting (marking the end of the Sabbath day), all those who had any who were sick with various diseases brought them to Jesus; and laying His hands on each of them, He was healing them (exhibiting His authority as Messiah).  

Just as Jesus exhibited His authority on earth against sickness, so should we.  We exercise our authority by building up our confession of faith and speaking the Word against the storm of illness and disease.  Jesus died and went to the cross to give us that authority it is ours as believers to use.