It is easy enough to believe that yet they meant well in what they did. It probably seemed to them the right thing to do. After such a stupendous display as they had just witnessed, of the flaming glory of Jehovah, why should they not, in token of reverence and adoration, offer incense, even in the most immediate presence of Jehovah? And why should such minor variations from the appointed law, as to manner, or time, or place, matter very much, so the motive was worship? So may they probably have reasoned, if indeed they thought at all. But, nevertheless, this made no difference; all the same, "fire came forth from Jehovah, and devoured them." They had been but so lately consecrated! and—as we learn from ver. 5—their priestly robes were on them at the time, in token of their peculiar privilege of special nearness to God! But this, too, made no difference; "there came forth fire from before the Lord and devoured them."
Their sin, in the form in which it was committed, can never be repeated; but as regards its inner nature and essence, no sin has been in all ages more common. For the essence of their sin was this, that it was will-worship; worship in which they consulted not the revealed will of God regarding the way in which He would be served, but their own fancies and inclinations. The directions for worship had been, as we have seen, exceedingly full and explicit; but they apparently imagined that the fragrance of their incense, and its intrinsic suitableness as a symbol of adoration and prayer, was sufficient to excuse neglect of strict obedience to the revealed will of God touching His own worship. Their sin was not unlike that of Saul in a later day, who thought to excuse disobedience by the offering of enormous sacrifices. But he was sharply reminded that "to obey is better than sacrifice" (1 Sam. xv. 22); and the priesthood were in like manner on this occasion very terribly taught that obedience is also better than incense, even the incense of the sanctuary.
In all ages, men have been prone to commit this sin, and in ours as much as any. It is true that in the present dispensation the Lord has left more in His worship than in earlier days to the sanctified judgment of His people, and has not minutely prescribed details for our direction. It is true, again, that there is, and always will be, room for some difference of judgment among good and loyal servants of the Lord, as to how far the liberty left us extends. But we are certainly all taught as much as this, that wherever we are not clear that we have a Divine warrant for what we do in the worship of God, we need to be exceeding careful, and to act with holy fear, lest possibly, like Nadab and Abihu, we be chargeable with offering "strange fire," which the Lord has not commanded. And when one goes into many a church and chapel, and sees the multitude of remarkable devices by which, as is imagined, the worship and adoration of God is furthered, it must be confessed that it certainly seems as if the generation of Nadab and Abihu was not yet extinct; even although a patient God, in the mystery of His long-suffering, flashes not instantly forth His vengeance.
This then is the first lesson of this tragic occurrence. We have to do with a God who is very jealous; who will be worshipped as He wills, or not at all. Nor can we complain. If God be such a Being as we are taught in the Holy Scripture, it must be His inalienable right to determine and prescribe how He will be served.
And it is a second lesson, scarcely less evident, that with God, intention of good, though it palliate, cannot excuse disobedience where He has once made known His will. No one can imagine that Nadab and Abihu meant wrong; but for all that, for their sin they died.
Again, we are herein impressively taught that, with God, high position confers no immunity when a man sins; least of all, high position in the Church. On the contrary, the greater the exaltation in spiritual honour and privilege, the more strictly will a man be held to account for every failure to honour Him who exalted him. We have seen this illustrated already by the law of the sin-offering; and this tragic story illustrates the same truth again.
But the question naturally arises, How could these men, who had been so exalted in privilege, who had even beheld the glory of the God of Israel in the holy mount (Exod. xxiv. 1, 9, 10), have ventured upon such a perilous experiment? The answer is probably suggested by the warning which immediately followed their death (vv. 8, 9): "The Lord spake unto Aaron, saying, Drink no wine nor strong drink, ... when ye go into the tent of the meeting, that ye die not." It is certainly distinctly hinted by these words, that it was under the excitement of strong drink that these men so fatally sinned.
If so, then, although their sin may not be repeated in its exact form among us, yet the fact points a very solemn warning, not only regarding the careless use of strong drink, but, more than that, against all religious worship and activity which is inspired by other stimulus than by the Holy Spirit of God. Of this every age of the Church's history has furnished sad examples. Sometimes we see it illustrated in "revivals," even in such as may be marked by some evidence of the presence of the Spirit of God; when injudicious speakers seek by various methods to work up what is, after all, merely a physical excitement of a strange, infectious kind, though too often mistaken for the work of the Holy Spirit of God. More subtle and yet more common is the sin of such as in preaching the Word find their chief stimulation in the excitement of a crowded house, or the visible signs of approbation on the part of the hearers; and perhaps sometimes mistake the natural effect of this influence for the quickening power of the Holy Ghost, and go on to offer before the Lord the incense of their religious service and worship, but with "strange fire." Of this all need to beware; and most of all, ministers of the Word.
The penalty of sin is often long delayed, but it did not lag in this case. The strange fire in the hands of Nadab and Abihu was met by a flash of flame that instantly withered their life; and, just as they were, their priestly robes upon them unconsumed, their censers in their hands, they dropped dead before the fatal bolt.