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Commentary Index | Return to PrayerRequest.comAdam Clarke Commentary - Leviticus 17:11 - 17:11
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For the life of the flesh is in the blood - This sentence, which contains a most important truth, had existed in the Mosaic writings for 3600 years before the attention of any philosopher was drawn to the subject. This is the more surprising, as the nations in which philosophy flourished were those which especially enjoyed the Divine oracles in their respective languages. That the blood actually possesses a living principle, and that the life of the whole body is derived from it, is a doctrine of Divine revelation, and a doctrine which the observations and experiments of the most accurate anatomists have served strongly to confirm. The proper circulation of this important fluid through the whole human system was first taught by Solomon in figurative language, Ecc 12:6; and discovered, as it is called, and demonstrated, by Dr. Harvey in 1628; though some Italian philosophers had the same notion a little before. This accurate anatomist was the first who fully revived the Mosaic notion of the vitality of the blood; which notion was afterward adopted by the justly celebrated Dr. John Hunter, professor of anatomy in London, and fully established by him by a great variety of strong reasoning and accurate experiments. To support this opinion Dr. Hunter proves: -
1. That the blood unites living parts in some circumstances as certainly as the yet recent juices of the branch of one tree unite with that of another; and he thinks that if either of these fluids were dead matter, they would act as stimuli, and no union would take place in the animal or vegetable kingdom; and he shows that in the nature of things there is not a more intimate connection between life and a solid than between life and a fluid.
2. He shows that the blood becomes vascular, like other living parts of the body; and he demonstrated this by a preparation in which vessels were clearly seen to arise from what had been a coagulum of blood; for those vessels opened into the stream of the circulating blood, which was in contiguity with this coagulated mass.
3. He proves that if blood be taken from the arm in the most intense cold that the human body can suffer, it will raise the thermometer to the same height as blood taken in the most sultry heat. This is a very powerful argument for the vitality of the blood, as it is well known that living bodies alone have the power of resisting great degrees of heat and cold, and of maintaining in almost every situation while in health that temperature which we distinguish by the name of animal heat.
4. He proves that blood is capable of being acted upon by a stimulus, as it coagulates on exposure to the air, as certainly as the cavities of the abdomen and thorax become inflamed from the same cause. The more the blood is alive, i. e., the more the animal is in health, the sooner the blood coagulates on exposure; and the more it has lost of the living principle, as in cases of violent inflammation, the less sensible it is to the stimulus produced by being exposed, and coagulates more slowly.
5. He proves that the blood preserves life in different parts of the body. When the nerves going to any part are tied or cut, the part becomes paralytic, and loses all power of motion, but it does not mortify. But let the artery be cut, and then the part dies and mortification ensues. It must therefore be the vital principle of the blood that keeps the part alive; nor does it appear that this fact can be accounted for on any other principle.
6. He thinks this vitality farther proved from the case of a person who was brought to St. George’s hospital for a simple fracture of the os humeri, and who died about a month after. As the bones had not united, he injected the arm, and thus found that the coagulated blood which filled the cavity between the extremities of the fractured bones was become vascular, and in some places very much so, which vessels, had it been dead matter, it never could have produced.
This system has been opposed, and arguments have been adduced to prove that the principle of vitality exists not in the blood but in the nervous system. But every argument on this ground appears to be done away by the simple consideration that the whole nervous system, as well as every other part of the body, is originally derived from the blood; for is it not from the blood of the mother that the fetus has its being and nourishment in the womb? Do not all the nerves, as well as the brain, etc., originate from that alone? And if it be not vital can it give the principle of vitality to something else, which then exclusively (though the effect of a cause) becomes the principle of vitality to all the solids and fluids of the body? This seems absurd. That the human being proceeded originally from the blood admits of no doubt; and it is natural and reasonable to suppose that as it was the cause under God which generated all the other parts of the body, so it still continues to be the principle of life, and by it alone all the wastes of the system are repaired. Two points relative to this subject are strongly asserted in Divine revelation, one by Moses, the other by St. Paul.
1. Moses says, The Life of the flesh is in the Blood, Lev 17:11. This has been proved by the most indisputable facts.
2. St. Paul says, God hath made of One Blood all nations of men, Act 17:26. And this is demonstrated, not only from there being only one pair from whom all the nations of men have been derived, but also from the fact that every human being, from the first-born of Eve to the present hour, has been formed out of and supported by the mother’s blood; and that from the agency of this fluid the human body, after being born into the world, has its increment and support.
The reason given by God for the law against eating blood is perfectly conclusive: I will set my face against that soul that eateth blood - for the Life (נפש nephesh) of the flesh is in the Blood, and I have given it to you upon the altar, to make an atonement for your souls (נפשתיכם naphshotheychem, your Lives): for it is the blood (because it is the Life, נפש nephesh) that maketh an atonement for the soul (בנפש bannephesh, for the life; for the word is the same in all these cases). By transgression a man forfeits his Life to Divine justice, and he must die, did not mercy provide him a substitute. The life of a beast is appointed and accepted by God as a substitute for the sinner’s life (in reference to the life of Christ, which was to be given for the life of the world); but as this life is in the Blood, and as the blood is the grand principle of vitality, therefore the blood is to be poured out upon the altar: and thus the life of the beast becomes a substitute for the life of the man.
And it is well worthy of being remarked, that Christ not only died for sinners, but our redemption is everywhere attributed to his Blood, and the shedding of that blood; and that on the altar of the cross, this might make an atonement for the lives and souls of men, he not only bowed his head, and gave up the ghost, but his side was opened, the pericardium and the heart evidently pierced, that the vital fluid might be poured out from the very seat of life, and that thus the blood, which is the life, should be poured out to make an atonement for the life of the soul. The doctrine of Moses and Paul proves the truth of the doctrine of Harvey and Hunter; and the reasonings and experiments of Harvey and Hunter illustrate and confirm the doctrine of Moses and Paul - Here then is a farther proof of the truth and authority of Divine revelation. See Clarke’s note on Gen 9:4; Dr. J. Corrie’s Essay on the Vitality of the Blood; and the article Blood, in the Encyclopaedias.