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 [1] . 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.

Footnotes

1 - "Ut secundo loco in societatem accedant."

XXIX. The Covenant with Noah
13. קשׁת qeshet, "bow; related: be bent."
14. ענן ‛ānan, "cover, cast over; noun: cloud."
The covenant made with Noah Genesis 6:18 is now formally confirmed. The purpose conceived in the heart Genesis 8:21 now receives significant expression. Not only a new blessing is bestowed, but also a new covenant is formed with Noah. For he that has offered an acceptable sacrifice is not only at peace with God, but renewed in mind after the image of God. He is therefore a fit subject for entering into a covenant.

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.

As the old world was ruined, to be a monument of justice, so this world remains to this day a monument of mercy. But sin, that drowned the old world, will burn this. Articles of agreement among men are sealed, that what is promised may be the more solemn, and the doing of what is covenanted the more sure to mutual satisfaction. The seal of this covenant was the rainbow, which, it is likely, was seen in the clouds before, but was never a seal of the covenant till now it was made so. The rainbow appears when we have most reason to fear the rain prevailing; God then shows this seal of the promise, that it shall not prevail. The thicker the cloud, the brighter the bow in the cloud. Thus, as threatening afflictions abound, encouraging consolations much more abound. The rainbow is the reflection of the beams of the sun shining upon or through the drops of rain: all the glory of the seals of the covenant are derived from Christ, the Sun of righteousness. And he will shed a glory on the tears of his saints. A bow speaks terror, but this has neither string nor arrow; and a bow alone will do little hurt. It is a bow, but it is directed upward, not toward the earth; for the seals of the covenant were intended to comfort, not to terrify. As God looks upon the bow, that he may remember the covenant, so should we, that we may be mindful of the covenant with faith and thankfulness. Without revelation this gracious assurance could not be known; and without faith it can be of no use to us; and thus it is as to the still greater dangers to which all are exposed, and as to the new covenant with its blessings.

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 Genesis 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 (Genesis 9:11) and the sign which was to keep it before the sight of men (Genesis 9:12): "I give (set) My bow in the cloud" (Genesis 9:13). When God gathers (ענן Genesis 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 Genesis 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).