JESUS said,

But you are not to be called Master (Rabbi) because one is your teacher, and you are all brothers.

 And do not call anyone your father (Papa) on earth, for one is your heavenly Father. 

And do not be called Guides, because one is your Leader. 

And the greatest among you will be your servant. 

And whoever exalts himself will be humbled, and whoever humbles himself will be exalted.

Matthew 23:8-12