Deuteronomy 29:16

16.For ye know how we have dwelt in the land of Egypt. We know how greatly men’s minds are tickled by novelty; and this might occur to the Israelites when, upon entering the land of Canaan, they would see many forms of idolatry hitherto unknown, which would be so many snares to entangle them. Although, therefore, they were not as yet accustomed to such corruptions, he exhorts them to beware by former instances; for they were not ignorant that God had held in abomination the superstitions of Egypt, and also of other nations, which He had punished in terrible ways. Consequently Moses reminds them that there was no reason why the people should be carried away to imitate the rites of the Gentiles with which they were unacquainted, since they knew by extraordinary proofs that whatever imaginations had been invented by heathen nations were hateful to God. This argument, then, is drawn from experience, whereby the Israelites had been abundantly admonished, that they should hereafter beware of all delusions. But, when he passes from individual men and women to families and tribes, he indicates that those who are associated with others in sin, seek to excuse themselves in vain by their numbers; since a whole nation is as much to be condemned as a single person.

The conclusion of verse 18, “lest there should be among you a root, ” etc., seems to be tamely explained by some, (267) lest there should be venomous men, who should bring forth bitter fruits to God; for by the word root I rather under stand the hidden principles of sins, which, unless they be prevented in good time, spring up with collected vigor and lift themselves on high; for indulgence in sin increases by concealment and connivance. And to this the author of the Epistle to the Hebrews seems to allude when he exhorts believers lest, through their negligence, “any root of bitterness, springing up, trouble them, and thereby many be defiled.” (Hebrews 12:15.) As soon, therefore, as any one should endeavor to excite his brethren to worship false gods, God commands him to be plucked up, lest the poison should burst forth, and the bitter root should produce its natural fruits in the corruption of others. Wormwood (268) (absinthium) is here used, as often elsewhere, in a bad sense, on account of its unpleasant savour; unless perhaps it is some other herb, as is more probable.