Jesus said in Luke 6:46, "and why do you ye call me, Lord, Lord and do not the things which I say?"
Since we believe that Jesus is Lord, why don't we obey everything He says? Doesn't make any sense not to. When God shows you something or gives you a command, do it! He knows what's best for us. He is King of kings and Lord of lords. We need to give Him praise every day of our lives.