Whosoever will be ( θε ìλῃ … εἶναι) chief (first, πρῶτος)… servant (bondservant, δοῦλος). The characteristic of the Christian ruler should be humility. Christ enforces the teaching of the previous verse more emphatically by altering the terms in which it was stated.
"Great" now becomes "first;" "minister," "slave." Of these two last words the former would imply rather occasional service, to meet some temporary call; the latter, the regular business of a slave bound to his master at all times.
We do not gather from this passage that the Christian minister, called by God, is to take his doctrine from his congregation, or to be directed by them in his labours; but he is to devote time, talents, faculties, to the good of his flock, to spend and be spent in their service, to let no private interests or pursuits interfere with his manifold duties to those whom he oversees.
The same sentiment is found in Matthew 23:11.