Matthew 20:25-28

But Jesus called them and said, “You know that the rulers of the Gentiles lord it over them, and those in high positions use their authority over them.  It must not be this way among you! Instead whoever wants to be great among you must be your servant,  and whoever wants to be first among you must be your slave—  just as the Son of Man did not come to be served but to serve, and to give his life as a ransom for many.”

Jesus is a great example of a leader who does not exercise authority over His disciples. He was more interested in serving His Father in Heaven, in serving His disciples (washed their feet, and it was more than just washing their feet), and in serving all people on earth by taking their place on the cross. Any kind of authority we are given in life pales in comparison to the authority Jesus was given by His Father. Jesus was able to live in service to others, and we are called to do likewise and "be last" for His glory.