Adam and Eve walked in the spirit and worshiped God before the fall. They were also left opened to fulfill the lust of the flesh if they chose to at the same time. Lust was conceived in Eve's heart,and it brought forth sin from that point on. And when it was finished, it brought fourth death. From the point of them eating the fruit, they walk after the flesh and no longer after the spirit., But it was Adam that released sin into the world. How? Because he bared the seed for all life to come in the image of what he had become.. If he do not eat the fruit, even though Eve did. having children would have been still in the image and likeness of God. Adam was the root of sin, by walking after the flesh,and it began to grow with Seth. where everyone after Adam walked after the flesh. That is how sin was released into the world. It was not some kind of demon or spirit that he released.,but by child bearing. Now you know how much sin is in the world, and the end result can only be as God has predicted. Jesus came to bring back those glory days that Adam and Eve had with God before their fall.