Leadership is all about service

Jesus called them together and said, “You know that those who are regarded as rulers of the Gentiles lord it over them, and their high officials exercise authority over them. Not so with you. Instead, whoever wants to become great among you must be your servant, and whoever wants to be first must be slave of all. For even the Son of Man did not come to be served, but to serve, and to give his life as a ransom for many.” —Mark 10:42–45

When people aspire to leadership, it often stems from a hunger for significance. This is a dangerous reason to seek leadership because once you get it, you’re likely to abuse it.
Jesus adds to the idea that whoever wants to be great must be a servant, but he adds a new component. The higher you want to climb, the more of a servant you need to become. If you want to be at the front of the pack, you need to be the slave of all.