Allah the Almighty recounted this third lesson Adam learned in Paradise: Indeed We made a covenant with Adam before, but he forgot, and We found on his part no firm will power. Remember when We said to the angels "Prostrate yourselves to Adam." They prostrated (all) except Iblis, who refused. then
We said: "O Adam! verily, this is an enemy to you and to your wife. so let him not get you both out of Paradise, so that you be distressed in misery. Verily, you have (a promise from Us) that you will never be hungry therein nor naked. And you will suffer not from thrist therein nor from the sun's heat."
then Satan whispered to him, saying "O Adam! Shall I lead you to the Tree of Eternity and to a kingdom that will never waste away?" Then they both ate of that tree, and so their private parts appeared to them, and they began to stick on themselves the leaves from Paradise for their covering. Thus did Adam disobey his Lord, so he went astray. Then his Lord chose him, and turned to him with forgiveness and gave him guidance.
Allah said: "Get you down (upon the earth), both of you, together from Paradise, some of you are an enemy to some others. THen if there comes to you guidance from Me, then whoever follows My Guidance shall neither go astray, nor fall into distress and misery. But whosoever turns away from My Reminder (neither believes in this Quran nor acts on its orders etc). Verily, for him is a life of hardship and We shall raise him up blind on the Day of Resurrection."
He will say: "O my Lord! Why have you raised me up blind, while I had sight before."
Allah said: "like this, Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc). came unto you, but you disregarded them (you left them, did not think deeply in them, and you turned away from them), and so this Day, you will be neglected in the Hellfire, away from Allah's Mercy.)"
And thus do We requite him who transgresses beyond bounds (commits the great sins and disobeys his Lord (allah) and believes not in His Messengers, and His revealed Books, like this Quran etc), and believes not in the Ayat (proofs, evidences, verses, lessons, signs, revelations, etc). of his Lord, and the torment of the Hereafter is far more severe and more lasting. (Ch 20:115-127)
Some people believe that the reason why mankind does not dwell in Paradise is that Adam was disobedient and that if it had not been for this sin, we could have been there all along. These are naive fictions because when Allah wanted to create Adam, He said to the angels, "I shall make a vicegerent on the earth." He did not say, "I shall make a vicegerent in Paradise."
Adam's descent on earth, then, was not due to degradation but rather it was dignified descent.
Allah knew that Adam and Eve would eat of the tree and descend to earth. He knew that Satan would rape their innocence. That experience was essential for their life on earth; it was a cornerstone of their vicegerency. It was meant to teach Adam, Eve, and their progeny that it was Satan who had caused them to be expelled from Paradise and that the road to Paradise can only be reached by obedience to Allah and enmity to Satan.
Could it be said that Adam and the rest of mankind were predestined to sin and to be expelled from Paradise and sent to the earth? In fact, this fiction is as naive as the first one.
Adam complete free will, and he bore the consequences of his deed. He disobeyed by eating of the forbidden tree, so Allah dismissed him from Paradise. His disobedience does not negate his freedom. On the contrary it is a consequence of it.
The truth of the matter is that Allah knew what was going to happen, as He always know the outcome of events before they take place. However Allah does not force things to happen. He grants free will to His human creatures. On that He bases His supreme wisdom in populating the earth, establishing the vicegerents, and so on.
