For the man ... - The age of the man is mentioned to show the certainty and greatness of the miracle. If it had been a man who had been lame but a few years, or if it had been a child or a very young man, the case would not been so remarkable. But after a continuance of 40 years, all hope of healing him by any ordinary means must have been abandoned, and all pretence that this was jugglery or deception must have been absurd.

The man was above forty years old - The disease was of long standing, and consequently the more inveterate; but all difficulties, small or great, yield equally to the sovereign power of God. It is as easy with God to convert a sinner of forty or four-score, as one of ten years old. But he who now refuses to obey the call of God has neither reason nor revelation to support himself even in the most distant hope that he shall get, in a future time, the salvation which he rejects in the present.

For the man was above forty years old,.... So that the miracle was the greater, that a man born lame, and who had been so above forty years, should have a cure; and he was the more known to the people, and his testimony met with more credit:

on whom this miracle of healing was showed; both for the good of men, for the glory of God, and for the confirmation of the Gospel of Christ.

For the man was above forty years old, on whom this miracle of healing was shewed.

4:22 The man was above forty years old. Therefore known to everybody as a life-long cripple.

4:15-22 All the care of the rulers is, that the doctrine of Christ spread not among the people, yet they cannot say it is false or dangerous, or of any ill tendency; and they are ashamed to own the true reason; that it testifies against their hypocrisy, wickedness, and tyranny. Those who know how to put a just value upon Christ's promises, know how to put just contempt upon the world's threatenings. The apostles look with concern on perishing souls, and know they cannot escape eternal ruin but by Jesus Christ, therefore they are faithful in warning, and showing the right way. None will enjoy peace of mind, nor act uprightly, till they have learned to guide their conduct by the fixed standard of truth, and not by the shifting opinions and fancies of men. Especially beware of a vain attempt to serve two masters, God and the world; the end will be, you can serve neither fully.