32:21-29 Never did any wise man make a more frivolous and foolish excuse than that of Aaron. We must never be drawn into sin by any thing man can say or do to us; for men can but tempt us to sin, they cannot force us. The approach of Moses turned the dancing into trembling. They were exposed to shame by their sin. The course Moses took to roll away this reproach, was, not by concealing the sin, or putting any false colour upon it, but by punishing it. The Levites were to slay the ringleaders in this wickedness; yet none were executed but those who openly stood forth. Those are marked for ruin who persist in sin: those who in the morning were shouting and dancing, before night were dying. Such sudden changes do the judgments of the Lord sometimes make with sinners that are secure and jovial in their sin.

29. Consecrate yourselves to-day to the Lord—or, "Ye have consecrated yourselves to-day." The Levites, notwithstanding the dejection of Aaron, distinguished themselves by their zeal for the honor of God and their conduct in doing the office of executioners on this occasion; and this was one reason that they were appointed to a high and honorable office in the service of the sanctuary.