Adam and Eve in the Garden of Eden understood by the Word that the animal killed by Elohim for its skin to cover them in their sin foreshadowed the Messiah, whose heel would be bruised (His crucifixion) but who would crush the head of that wily Satan serpent (by Jesus’ resurrection conquering death), yet the ancients before and after the Flood mostly embraced only the animal sacrifice part of the equation, to appease “the gods,” while repentance for forgiveness has always been that sought by Elohim.