Here are some thoughts Jesus gave to us about being great.
If we want to be great in the Kingdom.
Be the servant.
And if you want to be first.
Become a bond-servant.
I notice that Jesus did not put down the desire to be great in the Kingdom of God.
He simply told the disciples how it can be done.
Being great and becoming first means serving other people.
As it has been said before...
"You know that you are a servant when people treat you like one!"