Shall break one of these least commandments. — The words seem at first to imply that even the ceremonial law was to be binding in its full extent upon Christ’s disciples. The usage of the time, however, confined the word to the moral laws of God (as in Sir. 32:23-24), and throughout the New Testament it is never used in any other sense, with the possible exception of Hebrews 7:5; Hebrews 7:16 (comp. especially Romans 13:9; 1 Corinthians 7:19). And the context, which proceeds at once to deal with moral laws and does not touch on ceremonial, is in accordance with this meaning. The “least commandments,” then, are those which seemed trivial, yet were really great — the control of thoughts, desires, words, as compared with the apparently greater commands that dealt with acts. The reference to “teaching” shows that our Lord was speaking to His disciples, as the future instructors of mankind, and the obvious import of His words is that they were to raise, not lower, the standard of righteousness which had been recognised previously.
Shall be called the least in the kingdom of heaven. — The consequence of tampering with the great laws of duty, or the least laws, which are practically great, is described in terms at once severe and gentle; gentle, because the sentence, where the guilt is not wilful, or is repented of, is not one of absolute exclusion from the kingdom; severe in so far as being the “least” in that kingdom, the object of pity or sorrow to others, involved a severe humiliation to those who aimed at being the highest. To that condemnation many in every age of the Church have been liable, the Anthiomian fanatic and the Jesuit casuist standing so far on the same footing.
Whosoever shall do and teach. — Here again the teaching work of the disciples is prominent. The combination is in this case even more significant than in the other. Not right doing only, still less right teaching only, but both together, made up the ideal of the preacher’s work.
Great. — Not “greatest.” The avoidance of the latter word, interpreted by the later teaching of 18:4, would seem to have been deliberate. Men might aim at a positive standard of the greatness of the true teacher and the true worker, but the conscious aim at being “greatest” was self-frustrating. That honour belonged to him only who was all unconscious that he had any claim to it.