Why was the blood shed from the sacrificial animals?
Because Adam believed what God said, blood was shed from sacrificial animals to provide an imputed covering. It not only covered their physical bodies but clothed them with a spiritual garment that hid old Adam, granting them the imputed righteousness of God.
Les explains that because Adam had the ability to believe what God said, the blood was shed from the sacrificial animals. This was an imputed covering and imputed righteousness. It not only covered their physical body but clothed them with a spiritual garment that hid old Adam, so he now had the imputed righteousness of God. Les connects this to Isaiah 61:10, where the prophet rejoices because he is clothed with the garments of salvation, and to Romans 3, showing that when God clothes Adam, Isaiah, and a believer, it is all the same thing: the imputed righteousness of God.