John Calvin on Acts 22:10-11

10. What shall I do, Lord? This is the voice of a tamed man, and this is the true turning unto the Lord; when laying away all fierceness and fury, we bow down our necks willingly to bear his yoke, and are ready to do whatsoever he commandeth us. Moreover, this is the beginning of well-doing, to ask the mouth of God; for their labor is lost who think upon repentance without his word. Furthermore, in that Christ appointeth Ananias to be Paul’s master, he doth it not for any reproach, or because he refuseth to teach him; but by this means he meaneth to set forth, and also to beautify the outward ministry of the Church.

And even in the person of one man, he teacheth us “Commune documentum nobis praebuit,” he hath given us a common proof, that we must not grudge to hear him speak with the tongue of men. To the same end tendeth that which followeth immediately, that he was blind, until offering himself to become a scholar, he had declared “Probasset,” he had proved. the humility of his faith. God doth not indeed make blind all those whom he will lighten; but there is a general rule prescribed to all men, that those become foolish with themselves who will be wise to him.

Acts 22:12-15

12. And one Ananias, a godly man according to the law, approved by the testimony of all the Jews which dwelt there, 13. Coming unto me, and standing by me, said to me, Brother Saul, receive thy sight. And I receiving my sight, the same hour saw him. 14. But he said to me, The God of our fathers hath prepared thee that thou mightest know his will, and see the Just, and hear a voice from his mouth. 15. Because thou shalt be his witness before all men of those things which thou hast seen and heard. 16. And now why stayest thou? Arise, and be baptized, and wash away thy sins, in calling upon the name of the Lord.