Hello dear friends, Authority the ability to exert influence on others and then cause achange. Jesus had Authority actually throughtout his preachings he used authority where necessary.Like when he rubuked the evil spirits from that man who was demon possed,hadn't been authority the demons wouldn't have gone.Authority is the power still that we as God's childeren have to influence others to  cause changes in their lives.Forexample we use Authority to rebuke sickness from people's lives,to preach and also to put things in order.