But of the tree of knowledge of good and evil,.... Of the name of this tree, and the reasons of it,See Gill on "Ge 2:9"thou shalt not eat of it; not that this tree had any efficacy in it to increase knowledge, and improve in science and understanding, as Satan suggested God knew; and therefore forbid the eating of it out of envy to man, which the divine Being is capable of; or that there was anything hurtful in it to the bodies of men, if they had eaten of it; or that it was unlawful and evil of itself, if it had not been expressly prohibited: but it was, previous to this injunction, a quite indifferent thing whether man ate of it or not; and therefore was pitched upon as a trial of man's obedience to God, under whose government he was, and whom it was fit he should obey in all things; and since he had a grant of all the trees of the garden but this, it was the greater aggravation of his offence that he should not abstain from it:for in the day thou eatest thereof thou shalt surely die; or "in dying, die" ; which denotes the certainty of it, as our version expresses it; and may have regard to more deaths than one; not only a corporeal one, which in some sense immediately took place, man became at once a mortal creature, who otherwise continuing in a state of innocence, and by eating of the tree of life, he was allowed to do, would have lived an immortal life; of the eating of which tree, by sinning he was debarred, his natural life not now to be continued long, at least not for ever; he was immediately arraigned, tried, and condemned to death, was found guilty of it, and became obnoxious to it, and death at once began to work in him; sin sowed the seeds of it in his body, and a train of miseries, afflictions, and diseases, began to appear, which at length issued in death.
Moreover, a spiritual or moral death immediately ensued; he lost his original righteousness, in which he was created; the image of God in him was deformed; the powers and faculties of his soul were corrupted, and he became dead in sins and trespasses; the consequence of which, had it not been for the interposition of a surety and Saviour, who engaged to make satisfaction to law and justice, must have been eternal death, or an everlasting separation from God, to him and all his posterity; for the wages of sin is death, even death eternal, Ro 6:23.
So the Jews interpret this of death, both in this world and in the world to come. twmt twm Pagninus, Montanus, &c. Tikkune Zohar, correct. 24. fol. 68. 1. correct. 54. fol. 90. 2. correct. 66. fol. 100.