Namely, they had a spirit which began as the seed which was the child of God, and should grow up by Principle to maturity, whereupon they would become one with God, and God would live completely in and through them, as Father says. That was God's intention. In such a way also, a man or woman of faith has the experience of God's Spirit descending to them and their spiritual life begins. And the same with rebirth, or infusion of our new life. It is not only mind.
Animals have minds, which is in the sung-sang realm, at different levels.
We also have a mind of that type. This exists, not only in the sung-sang realm of the physical world, but in an entirely other world, the spiritual world. It was uniquely created by God, and waiting for man's advent. In some sense, it still hasn't really opened yet, as the Kingdom of Heaven in heaven. So, only Adam and Eve had that spirit, different from all the animals.