John Calvin on Acts 19:25-26

25. By this craft. Demetrius doth in this place filthily betray his malice. It is lawful for a man, in some measure, to provide for his private profit; but to trouble common [the public] peace for a man’s own gain, to overthrow “Pervertere,” to pervert. equity and right, to give over a man’s self to do violence and commit murder, to extinguish that of set purpose which is just and right; that is too great wickedness. Demetrius confesseth that this is the state of the cause, because, [viz. that] Paul denieth that those are gods which are made with men’s hands. He doth not inquire whether this be true or no; but being blinded with a desire to get gain, he is carried headlong to oppress true doctrine. The same blindness doth drive him headlong to seek violent remedies. Also the craftsmen, because they be afraid of poverty and hunger, run headlong as violently; for the belly is blind and deaf, so that it can admit no equity. For which cause, every one of us ought more to suspect himself, when the question is touching our own gain and profit, lest the same covetous desire which made these men so mad take away all difference of justice and injustice, of that which is filthy and that which is honest.