Messiah told us not to be a leader. He taught us to be servants. This is what not being called Rabbi is all about and yet many do not comprehend this passage because like others it is spiritually discerned. Rabbi means Master, so not being called Rabbi is not to be called Master or Leader. We have one who is our Leader, Yeshua HaMashiach. Messiah came as a servant and to show us the Father. He never elevated himself, it was the Father who lifted him up. When we take on the position of “Leader” we have disobeyed Messiah and lifted ourselves up. For this, those who do such things will be abased.
But you, do not be called ‘Rabbi,’ for One is your Teacher, the Messiah, and you are all brothers. And do not call anyone on earth your father, for One is your Father, He who is in the heavens. Neither be called leaders, for One is your Leader, the Messiah. But the greatest among you shall be your servant. And whoever exalts himself shall be humbled, and whoever humbles himself shall be exalted.
Matthew 23:8-12 TS2009