Matthew 23:8-11

23:8 But you are not to be called ‘Rabbi,’ for you have one Teacher and you are all brothers. 23:9 And call no one your ‘father’ on earth, for you have one Father, who is in heaven. 23:10 Nor are you to be called ‘teacher,’ for you have one teacher, the Christ. 23:11 The greatest among you will be your servant.