(21) I have done one work--i.e., the one conspicuous work of healing the infirm man on the Sabbath day, which He did at His last visit to Jerusalem. We have already had a reference to other works in John 2:23, and He Himself refers to His many good works in John 10:32.

Ye all marvel.--This answer is addressed to the multitude who said "Thou hast a devil," when He spoke of the intention to kill Him. This work on the Sabbath day, which provoked the deadly hostility of the hierarchy (John 5:16; John 5:18), was cause of wonder to them all. They, too, though not in the same degree, were led by it to take a hostile position.

Verse 21. - Jesus answered and said to them; i.e. to the multitude wire had so coarsely treated him, and to the "Jews" who were present, who were all marvelling together at the line he was taking. The very interruption was a proof both of the extent and consequence of their wonderment. One work I did, and ye are all marvelling. This one work was a very small fraction of his mighty signs, but it was one which, from its manner of operation, and from the fact that it was immediately brought before the religious authorities as an unlawful act (ch. 5.), and which, moreover, became the occasion for one of the greatest of his discourses, and for his solemn claim to be the Son of God and the Arbiter of life and death, of resurrection and judgment, made the profoundest impression on the Sanhedrin, compelled them to think that he was a Man who must be sooner or later arrested, and who deserved condign punishment. He must be either submitted to, confined as a madman, or killed as a blasphemer.

7:14-24 Every faithful minister may humbly adopt Christ's words. His doctrine is not his own finding out, but is from God's word, through the teaching of his Spirit. And amidst the disputes which disturb the world, if any man, of any nation, seeks to do the will of God, he shall know whether the doctrine is of God, or whether men speak of themselves. Only those who hate the truth shall be given up to errors which will be fatal. Surely it was as agreeable to the design of the sabbath to restore health to the afflicted, as to administer an outward rite. Jesus told them to decide on his conduct according to the spiritual import of the Divine law. We must not judge concerning any by their outward appearance, but by their worth, and by the gifts and graces of God's Spirit in them.Jesus answered and said unto them,.... Taking no notice of their passion, reproach, and blasphemy; but proceeding upon the thing he had in view, and which he was determined to reassume, and vindicate himself in;

I have done one work; that is, on the sabbath day; meaning, his cure of the man that had had a disorder eight and thirty years, who lay at Bethesda's pool; which single action, they charged with being a breach of the sabbath, he mentions with a view to their many, and daily violations of it:

and ye all marvel; at it, as a thing unheard of, as a most shocking piece of iniquity, as an intolerable evil; wondering that any man should have the front, to bid another take up his bed and walk, on the sabbath day: they did not marvel at the miracle that was wrought; but were amazed, offended, and disturbed, at its being done on the sabbath day.