18 So they called them and charged them not to speak or teach at all in the name of Jesus. 19 But Peter and John answered them, "Whether it is right in the sight of God to listen to you rather than to God, you must judge, 20 for we cannot but speak of what we have seen and heard." 21 And when they had further threatened them, they let them go, finding no way to punish them, because of the people, for all were praising God for what had happened.
Matthew Henry's Commentary on Acts 4:18-21
Commentary on Acts 4:15-22
(Read Acts 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.