You shouldn't judge yourself or others based on height.
John, who is short, runs a powerful health institution and deals with a lot of taller clients and workers.
John wants to have authority over other people.
John uses his superior business skills and knowledge to direct people's projects wisely, helping them complete them successfully.
John mounts a ruler on his office door and notes how tall each person is who enters his office, then tries to dominate the taller ones.
John's associates come to respect John and seek his advice and counsel, listening to and obeying what he says.
The taller people find John to be overbearing and controlling and decide not to work for him any more.