Jesus said to his disciples, ‘You must not allow yourselves to be called Rabbi, since you have only one master, and you are all brothers. You must call no one on earth your father, since you have only one Father, and he is in heaven. Nor must you allow yourselves to be called teachers, for you have only one Teacher, the Christ. The greatest among you must be your servant. Anyone who exalts himself will be humbled, and anyone who humbles himself will be exalted.’