Leviticus 10:1

1.And Nadab and Abihu, the sons of Aaron A memorable circumstance is here recorded, from whence it appears how greatly God abominates all the sins whereby the purity of religion is corrupted. Apparently it was a light transgression to use strange fire for burning incense; and again their thoughtlessness would seem excusable, for certainly Nadab and Abihu did not wantonly or intentionally desire to pollute the sacred things, but, as is often the case in matters of novelty, when they were setting about them too eagerly, their precipitancy led them into error. The severity of the punishment, therefore, would not please those arrogant people, who do not hesitate superciliously to criticise God’s judgments; but if we reflect how holy a thing God’s worship is, the enormity of the punishment will by no means offend us. Besides, it was necessary that their religion should be sanctioned at its very commencement; for if God had suffered the sons of Aaron to transgress with impunity, they would have afterwards carelessly neglected the whole Law. This, therefore, was the reason of such great severity, that the priests should anxiously watch against all profanation. Their crime is specified, viz., that they offered incense in a different way from that which God had prescribed, and consequently, although they may have erred from ignorance, still they were convicted by God’s commandment of having negligently set about what was worthy of greater attention. The “strange fire” is distinguished from the sacred fire which was always burning upon the altar: not miraculously, as some pretend, but by the constant watchfulness of the priests. Now, God had forbidden any other fire to be used in the ordinances, in order to exclude all extraneous rites, and to shew His detestation of whatever might be derived from elsewhere. Let us learn, therefore, so to attend to God’s command as not to corrupt His worship by any strange inventions. But if He so severely avenged this error, how horrible a punishment awaits the Papists, who are not ashamed obstinately to defend so many gross corruptions!