17 And now, brethren, I know that ye did it in ignorance, as also your rulers; 18 but God has thus fulfilled what he had announced beforehand by the mouth of all the prophets, that his Christ should suffer. 19 Repent therefore and be converted, for the blotting out of your sins, so that times of refreshing may come from [the] presence of the Lord, 20 and he may send Jesus Christ, who was foreordained for you, 21 whom heaven indeed must receive till [the] times of [the] restoring of all things, of which God has spoken by the mouth of his holy prophets since time began.

Matthew Henry's Commentary on Acts 3:17-21

Commentary on Acts 3:12-18

(Read Acts 3:12-18)

Observe the difference in the manner of working the miracles. Our Lord always spoke as having Almighty power, never hesitated to receive the greatest honour that was given to him on account of his Divine miracles. But the apostles referred all to their Lord, and refused to receive any honour, except as his undeserving instruments. This shows that Jesus was one with the Father, and co-equal with Him; while the apostles knew that they were weak, sinful men, and dependent for every thing on Jesus, whose power effected the cure. Useful men must be very humble. Not unto us, O Lord, not unto us, but to thy name, give glory. Every crown must be cast at the feet of Christ. The apostle showed the Jews the greatness of their crime, but would not anger or drive them to despair. Assuredly, those who reject, refuse, or deny Christ, do it through ignorance; but this can in no case be an excuse.

Commentary on Acts 3:19-21

(Read Acts 3:19-21)

The absolute necessity of repentance is to be solemnly charged upon the consciences of all who desire that their sins may be blotted out, and that they may share in the refreshment which nothing but a sense of Christ's pardoning love can afford. Blessed are those who have felt this. It was not needful for the Holy Spirit to make known the times and seasons of these dispensations. These subjects are still left obscure. But when sinners are convinced of their sins, they will cry to the Lord for pardon; and to the penitent, converted, and believing, times of refreshment will come from the presence of the Lord. In a state of trial and probation, the glorified Redeemer will be out of sight, because we must live by faith in him.