Let’s see if this makes it clearer for everyone.
Adam and Eve were created perfect by God and placed by him in a garden – Paradise, if you will. This garden was not heaven, but a paradise where they were protected from harm and had everything they needed. They had all the natural gifts man could have, plus preternatural gifts given them by God. These preternatural gifts enabled them, unlike us, to have complete control over their wills, intellect and emotions. They need never have sinned, or become sick or die, God’s plan being to take them to himself in heaven when their lives were through.
There was a test involved, however, which we all know they failed. In this test they were representing all of mankind as it’s perfect representives. As a result of this failure, man lost paradise and all the preternatural gifts (which resulted in what we call “original sin”). Since that time man has compounded his failure by personal sin upon sin.
Thanks be to God who, in his mercy, sent us a Saviour, Jesus Christ, who through his sacrifice on the Cross reversed Adam’s failure, paid for our sins and made is possible for us, through faith and baptism, to be restored to fellowship with God. Through this faith and our obedience we can one day be with God in heaven as was his plan all along.