They let them go for the present; for amongst them no acquittal was so peremptory or asolute, but that they might be tried again for the same fact upon further evidence. Because of the people; it was not the sense of the evil or sin, nor the apprehensions of God's displeasure and wrath, which deterred them; but the fear or favour of the people. The corruptions that are in the world are overruled for the good of God's children in it. All men glorified God; not only such as believed, but others also, could not but confess that this was the hand of God which had made the lame to walk, and rejoice in it, and by consequence have a very great veneration for the apostles, who were the instruments of it.
Related Commentaries of Acts 4:21
Acts 4:21
21 So when they had further threatened them, they let them go, finding nothing how they might punish them, because of the people: for all men glorified God for that which was done.