Matthew 23:8-12

8 But you are not to be called rabbi, for you have one teacher, and you are all brethren.
9 And call no man your father on earth, for you have one Father, who is in heaven.
10 Neither be called masters, for you have one master, the Christ.
11 He who is greatest among you shall be your servant;
12 whoever exalts himself will be humbled, and whoever humbles himself will be exalted.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.