Jamieson, Fausset and Brown on Matthew 23:9

9. And call no man your father upon the earth: for one is your Father, which is in heaven, &c.--To construe these injunctions into a condemnation of every title by which Church rulers may be distinguished from the flock which they rule, is virtually to condemn that rule itself; and accordingly the same persons do both--but against the whole strain of the New Testament and sound Christian judgment. But when we have guarded ourselves against these extremes, let us see to it that we retain the full spirit of this warning against that itch for ecclesiastical superiority which has been the bane and the scandal of Christ's ministers in every age. (On the use of the word "Christ" here, see on Mt 1:1).