Genesis 9:8

In God's second speech after the great flood, he promises to protect and preserve creation.

Whoso sheddeth man's blood . . . for in the image of God made he man--It is true that image has been injured by the fall, but it is not lost. In this view, a high value is attached to the life of every man, even the poorest and humblest, and an awful criminality is involved in the destruction of it.

Here is, I. The general establishment of God's covenant with this new world, and the extent of that covenant, Gen 9:9, Gen 9:10. Here observe, 1. That God is graciously pleased to deal with man in the way of a covenant, wherein God greatly magnifies his condescending favour, and greatly encourages man's duty and obedience, as a reasonable and gainful service. 2. That all God's covenants with man are of his own making: I, behold, I. It is thus expressed both to raise our admiration - "Behold, and wonder, that though God be high yet he has this respect to man," and to confirm our assurances of the validity of the covenant - "Behold and see, I make it; I that am faithful and able to make it good." 3. That God's covenants are established more firmly than the pillars of heaven or the foundations of the earth, and cannot be disannulled. 4. That God's covenants are made with the covenanters and with their seed; the promise is to them and their children. 5. That those may be taken into covenant with God, and receive the benefits of it, who yet are not capable of restipulating, or giving their own consent. For this covenant is made with every living creature, every beast of the earth.
II. The particular intention of this covenant. It was designed to secure the world from another deluge: There shall not any more be a flood. God had drowned the world once, and still it was as filthy and provoking as ever, and God foresaw the wickedness of it, and yet promised he would never drown it any more; for he deals not with us according to our sins. It is owing to God's goodness and faithfulness, not to any reformation of the world, that it has not often been deluged and that it is not deluged now. As the old world was ruined to be a monument of justice, so this world remains to this day, a monument of mercy, according to the oath of God, that the waters of Noah should no more return to cover the earth, Isa 54:9. This promise of God keeps the sea and clouds in their decreed place, and sets them gates and bars; hitherto they shall come, Job 38:10, Job 38:11. If the sea should flow but for a few days, as it does twice every day for a few hours, what desolation would it make! And how destructive would the clouds be, if such showers as we have sometimes seen were continued long! But God, by flowing seas and sweeping rains, shows what he could do in wrath; and yet, by preserving the earth from being deluged between both, shows what he can do in mercy and will do in truth. Let us give him the glory of his mercy in promising and of his truth in performing. This promise does not hinder, 1. But that God may bring other wasting judgments upon mankind; for, though he has here bound himself not to use this arrow any more, yet he has other arrows in his quiver. 2. Nor but that he may destroy particular places and countries by the inundations of the sea or rivers. 3. Nor will the destruction of the world at the last day by fire be any breach of his promise. Sin which drowned the old world will burn this.

And God spake unto Noah. That the memory of the deluge might not inspire them with new terrors, as often as the sky were covered with clouds, lest the earth should again be drowned; this source of anxiety is taken away. And certainly, if we consider the great propensity of the human mind to distrust, we shall not deem this testimony to have been unnecessary even for Noah. He was indeed endued with a rare and incomparable faith, even to a miracle; but no strength of constancy could be so great, that this most sad and terrible vengeance of God should not shake it. Therefore, whenever any great and continued shower shall seem to threaten the earth with a deluge, this barrier, on which the holy man may rely, is interposed. Now although his sons would need this confirmation more than he, yet the Lord speaks especially on his account. And the clause which follows, and to his sons who were with him,' is to be referred to this point. For how is it, that God, making his covenant with the sons of Noah, commands them to hope for the best? Truly, because they are joined with their father, who is, as it were, the stipulator of the covenant, so as to be associated with him, in a subordinate place [293] . Moreover, there is no doubt that it was the design of God to provide for all his posterity. It was not therefore a private covenant confirmed with one family only, but one which is common to all people, and which shall flourish in all ages to the end of the world. And truly, since at the present time, impiety overflows not less than in the age of Noah, it is especially necessary that the waters should be restrained by this word of God, as by a thousand bolts and bars lest they should break forth to destroy us. Wherefore, relying on this promise, let us look forward to the last day, in which the consuming fire shall purify heaven and earth.

Whoso sheddeth man's blood, by man shall his blood - Hence it appears that whoever kills a man, unless unwittingly, as the Scripture expresses it, shall forfeit his own life.
A man is accused of the crime of murder; of this crime he is guilty or he is not: if he be guilty of murder he should die; if not, let him be punished according to the demerit of his crime; but for no offense but murder should he lose his life. Taking away the life of another is the highest offense that can be committed against the individual, and against society; and the highest punishment that a man can suffer for such a crime is the loss of his own life. As punishment should be ever proportioned to crimes, so the highest punishment due to the highest crime should not be inflicted for a minor offense. The law of God and the eternal dictates of reason say, that if a man kill another, the loss of his own life is at once the highest penalty he can pay, and an equivalent for his offense as far as civil society is concerned. If the death of the murderer be the highest penalty he can pay for the murder he has committed, then the infliction of this punishment for any minor offense is injustice and cruelty; and serves only to confound the claims of justice, the different degrees of moral turpitude and vice, and to render the profligate desperate: hence the adage so frequent among almost every order of delinquents, "It is as good to be hanged for a sheep as a lamb;" which at once marks their desperation, and the injustice of those penal laws which inflict the highest punishment for almost every species of crime. When shall a wise and judicious legislature see the absurdity and injustice of inflicting the punishment of death for stealing a sheep or a horse, forging a twenty shillings' note, and Murdering A Man; when the latter, in its moral turpitude and ruinous consequences, infinitely exceeds the others?* (* On this head the doctor's pious wish has been realized since this paragraph was written. - Publishers)

And God spake unto Noah, and to his sons with him,.... Not only what is contained in the preceding verses, but in the subsequent ones:

saying; as follows.

To give Noah and his sons a firm assurance of the prosperous continuance of the human race, God condescended to establish a covenant with them and their descendants, and to confirm this covenant by a visible sign for all generations. בּרית הקים is not equivalent to בּרית כּרת; it does not denote the formal conclusion of an actual covenant, but the "setting up of a covenant," or the giving of a promise possessing the nature of a covenant. In summing up the animals in Gen 9:10, the prepositions are accumulated: first בּ embracing the whole, then the partitive מן restricting the enumeration to those which went out of the ark, and lastly ל yl, "with regard to," extending it again to every individual. There was a correspondence between the covenant (Gen 9:11) and the sign which was to keep it before the sight of men (Gen 9:12): "I give (set) My bow in the cloud" (Gen 9:13). When God gathers (ענן Gen 9:14, lit., clouds) clouds over the earth, "the bow shall be seen in the cloud," and that not for man only, but for God also, who will look at the bow, "to remember His everlasting covenant." An "everlasting covenant" is a covenant "for perpetual generations," i.e., one which shall extend to all ages, even to the end of the world. The fact that God Himself would look at the bow and remember His covenant, was "a glorious and living expression of the great truth, that God's covenant signs, in which He has put His promises, are real vehicles of His grace, that they have power and essential worth not only with men, but also before God" (O. v. Gerlach). The establishment of the rainbow as a covenant sign of the promise that there should be no flood again, presupposes that it appeared then for the first time in the vault and clouds of heaven. From this it may be inferred, not that it did not rain before the flood, which could hardly be reconciled with Gen 2:5, but that the atmosphere was differently constituted; a supposition in perfect harmony with the facts of natural history, which point to differences in the climate of the earth's surface before and after the flood. The fact that the rainbow, that "coloured splendour thrown by the bursting forth of the sun upon the departing clouds," is the result of the reciprocal action of light, and air, and water, is no disproof of the origin and design recorded here. For the laws of nature are ordained by God, and have their ultimate ground and purpose in the divine plan of the universe which links together both nature and grace. "Springing as it does from the effect of the sun upon the dark mass of clouds, it typifies the readiness of the heavenly to pervade the earthly; spread out as it is between heaven and earth, it proclaims peace between God and man; and whilst spanning the whole horizon, it teaches the all-embracing universality of the covenant of grace" (Delitzsch).