Wilt thou be made whole? He does not inquire about it, as if it were a doubtful matter, but partly in order to kindle in the man a desire of the favor which was offered to him, and partly to quicken the attention of the witnesses who were present, and who, if they had been thinking of something else, might not have perceived the miracle, as frequently happens in sudden occurrences. For these two reasons, therefore, this preparation was necessary.

Wilt thou be made whole? - Christ, by asking this question, designed to excite in this person faith, hope, and a greater desire of being healed. He wished him to reflect on his miserable state, that he might be the better prepared to receive a cure, and to value it when it came. Addresses of this kind are always proper from the preachers of the Gospel, that the hearts, as well of hardened as of desponding sinners, may be stirred up to desire and expect salvation. Do you wish to be healed? Do you know that you are under the power of a most inveterate and dangerous disease? If so, there is a remedy - have immediate recourse to the physician. Questions of this kind are frequently asked in the secret of our souls, by the inspirations of God's Spirit. Happy those who pay attention to them, and give right answers.

When Jesus saw him lie,.... In such a helpless condition:
and knew that he had been now a long time, in that case, or "in his disease", as the Ethiopic version supplies; even seven years before Christ was born; which is a proof of his omniscience: the words may be literally rendered, as they are in the Vulgate Latin and Syriac versions, "that he had had much time"; or as the Arabic version, "that he had had many years"; that is had lived many years, and was now an old man; he had his disorder eight and thirty years, and which seems from John 5:14 to have arisen from some sin of his, from a vicious course of living, perhaps intemperance; so that he might be a middle aged man, when this distemper first seized him, and therefore must be now stricken in years:
he saith unto him, wilt thou be made whole? which question is put, not as if it was a doubt, whether he was desirous of it, or not; for to what purpose did he lie and wait there else? but partly to raise in the man an expectation of a cure, and attention in the people to it: and it may be his sense and meaning is, wilt thou be made whole on this day, which was the sabbath; or hast thou faith that thou shall be made whole in this way, or by me?

saw him lie, and knew, &c.--As He doubtless visited the spot just to perform this cure, so He knows where to find His patient, and the whole previous history of his case (John 2:25).
Wilt thou be made whole?--Could anyone doubt that a sick man would like to be made whole, or that the patients came thither, and this man had returned again and again, just in hope of a cure? But our Lord asked the question. (1) To fasten attention upon Himself; (2) By making him detail his case to deepen in him the feeling of entire helplessness; (3) By so singular a question to beget in his desponding heart the hope of a cure. (Compare Mark 10:51).

Wilt thou be made whole? Jesus observed him and asked the question to arouse his attention.