Genesis 3:21

Coats of skins. — Animals, therefore, were killed even in Paradise; nor is it certain that man’s diet was until the flood entirely vegetarian (see Note on Genesis 1:29). Until sin entered the world no sacrifices could have been offered; and if, therefore, these were the skins of animals offered in sacrifice, as many suppose, Adam must in some way, immediately after the fall, have been taught that without shedding of blood is no remission of sin, but that God will accept a vicarious sacrifice. This is perhaps the most tenable view; and if, with Knobel, we see in this arrival at the idea of sacrifice a rapid development in Adam of thought and intellect, yet it may not have been entirely spontaneous, but the effect of divinely-inspired convictions rising up within his soul. It shows also that the innocence of our first parents was gone. In his happy state Adam had studied the animals, and tamed them and made them his friends; now a sense of guilt urges him to inflict upon them pain and suffering and death. But in the first sacrifice was laid the foundation of the whole Mosaical dispensation, as in Genesis 3:15 that of the Gospel. Moreover, from sacrificial worship there was alleviation for man’s bodily wants, and he went forth equipped with raiment suited for the harder lot that awaited him outside the garden; and, better far, there was peace for his soul, and the thought — even if still but faint and dim — of the possibility for him of an atonement.