The man answered and said unto them, Why herein is a marvellous thing, that ye know not from whence he is, and yet he hath opened mine eyes.

People's New Testament

9:30-33 Why herein is a marvellous thing. It was also a marvellous thing that one who was a blind beggar a few hours before should now expound theology to the very men that sat in Moses' seat (Mt 23:2) and show a better knowledge of the spirit of the Scriptures than the great ecclesiastics. Without the power of God no man could open the eyes of one born blind.

Wesley's Notes

9:30 The man answered - Utterly illiterate as he was. And with what strength and clearness of reason! So had God opened the eyes of his understanding, as well as his bodily eyes. Why, herein is a marvellous thing, that ye - The teachers and guides of the people, should not know, that a man who has wrought a miracle, the like of which was never heard of before, must be from heaven, sent by God.

Jamieson-Fausset-Brown Bible Commentary

30. The man answered, Herein is a marvellous thing, that ye know not from whence he is, and yet he hath opened mine eyes-He had no need to say another word; but waxing bolder in defense of his Benefactor, and his views brightening by the very courage which it demanded, he puts it to them how they could pretend inability to tell whether one who opened the eyes of a man born blind was "of God" or "a sinner"-from above or from beneath-and proceeds to argue the case with remarkable power. So irresistible was his argument that their rage burst forth in a speech of intense Pharisaism, "Thou wast altogether born in sins, and dost thou teach us?"-thou, a base-born, uneducated, impudent youth, teach us, the trained, constituted, recognized guides of the people in the things of God! Out upon thee!

Matthew Henry's Concise Commentary

9:24-34 As Christ's mercies are most valued by those who have felt the want of them, that have been blind, and now see; so the most powerful and lasting affections to Christ, arise from actual knowledge of him. In the work of grace in the soul, though we cannot tell when, and how, and by what steps the blessed change was wrought, yet we may take the comfort, if we can say, through grace, Whereas I was blind, now I see. I did live a worldly, sensual life, but, thanks be to God, it is now otherwise with me, Eph 5:8. The unbelief of those who enjoy the means of knowledge and conviction, is indeed marvellous. All who have felt the power and grace of the Lord Jesus, wonder at the wilfulness of others who reject him. He argues strongly against them, not only that Jesus was not a sinner, but that he was of God. We may each of us know by this, whether we are of God or not. What do we? What do we for God? What do we for our souls? What do we more than others?