Is not this the carpenter’s son? - Mark says, “Is not this the carpenter, the son of Mary?” Both these expressions would probably be used in the course of the conversation, and Matthew has recorded one and Mark the other. The expression recorded by Mark is a strong, perhaps decisive proof that he had himself worked at the business until he was 30 years of age. The people in the neighborhood would understand well the nature of his early employments. It is therefore almost certain that this had been his manner of life. A useful employment is always honorable. Idleness is the parent of mischief. Our Saviour, therefore, spent the greatest part of his life in honest, useful industry. Until the age of 30 he did not choose to enter on his great work; and it was proper before that time that he should set an example to the world of honorable though humble industry. Life is not wasted in such employments. They are appointed as the lot of man; and in the faithful discharge of duties in the relations of life, though obscure; in honest industry, however humble; in patient labor, if connected with a life of religion, we may be sure that God will approve our conduct. It was, moreover, the custom of the Jews - even those of wealth and learning - to train all their children to some “trade” or manual occupation. Thus Paul was a tent-maker. Compare Acts 18:3.
This was, on the part of the Saviour, an example of great condescension and humility. It staggers the faith of many that the Son of God should labour in an occupation so obscure and lowly. The infidel sneers at the idea that “He that made the worlds” should live thirty years in humble life as a poor and unknown mechanic. Yet the same infidel will loudly praise Peter the Great of Russia because he laid aside his imperial dignity and entered the British service as a “ship-carpenter,” that he might learn the art of building a navy. Was the purpose of “Peter” of more importance than that of the Son of God? If Peter, the heir to the throne of the Czars, might leave his elevated rank and descend to a humble employment, and secure by it the applause of the world, why might not the King of kings evince a similar character for an infinitely higher object?
His brethren, James ... - The fair interpretation of this passage is, that these were the sons and daughters of Joseph and Mary. The people in the neighborhood thought so, and spoke of them as such.