Authority: power to influence or command thought, opinion, or behavior

 Jesus had the authority to command demons to come of people and His actions had authority because He new the battle He was fighting and had conquered it in Heaven before He came to earth. 

Yes i do believe that Jesus believes that we are all valuable, it is our hearts that difine us. helping those that are less fortunate than us makes us valuable and giving with a pure heart makes us valuable, not judging others and see each other as equals makes us valuable. Jesus died for our sins giving us a second chances to redem ourselves so in helping others is what God would want from us, whether it be in material things or leading them towards God.

Having pure hearts like childern "who see everyone as the same" will get closer to God for God doesnt see your actions but your feels towards your actions. looking after the needy and lost is what God wants from all of us.