What man is he - In this verse there is a remarkable instance of the "perverseness" of men, of their want of candor, and of the manner in which they often look at a subject. Instead of looking at the miracle, and at the man's statement of the manner in which he was healed, they look only at what they thought to be a violation of the law. They assumed it as certain that nothing could make his conduct, in carrying his bed on the Sabbath day, proper; and they meditated vengeance, not only on the man who was carrying his bed, but on him, also, who had told him to do it. Thus men often assume that a certain course or opinion is proper, and when anyone differs from them they look only at the difference, but not at the reasons for it. One great source of dispute among men is that they look only at the points in which they differ, but are unwilling to listen to the reasons why others do not believe as they do. It is always enough to condemn one in the eyes of a bigot that he differs from "him," and he looks upon him who holds a different opinion, as the Jews did at this man, "as certainly wrong;" and such a bigot looks at the reasons why others differ from him just as the Jews did at the reason why this man bore his bed on the Sabbath - as not worth regarding or hearing, or as if they could not possibly be right.

Then asked they him,.... Suspecting who had made him whole, and gave him this order:
what man is that which said unto thee, take up thy bed and walk? they take no notice of the cure, being unwilling to give any glory to Christ, and still less to spread it; but chose rather that it should be obscured, hid, and unobserved; but they laid hold on that, which they thought might be improved to his reproach and scandal; and they call him a man, as supposing him to be a mere man, and a wicked man too, for giving orders to transgress a tradition of the elders, though no mere man could work such a cure as this was. And so the Jews since, though they cannot find fault with the cure, which they put an "if" upon, yet are highly displeased with the order, to take up his bed and carry it:
"if (say they (a)) he wrought a cure, lo, that is good, but why did he bid him take up his bed?''
the answer may be, to show that he was cured.
(a) Vet. Nizzachon, p. 207.