The necessity for Adam to sin - Netziv (Bereishis 2:4)

Netziv (Bereishis 2:4):This is the story of the Heavens and Earth when they were created…We have explained that the acts that are the purpose of creation is for G-d who knows all that He created and watches over it.and this is the purpose of the heavens and Earth that G-d dwells in Heaven and so to speak judges all the items on the Earth  according to the deeds of man. All this happened because of man since everything is conditional according to his deeds. We have already explained that man has two modes of functioning 1) The Elevated man where he exists and functions in the world as an angel in Heaven 2) Normal Man who is concerned with his own personal needs These two modes  serve creation  because if everybody was like Adam before he sinned there would be no reward or punishment nor would G-d’s glory and kindness be revealed in the world. In fact the prime source for these is when man is in the second mode functioning as a normal man. Nevertheless a great deal of G-d’s honor is revealed by the angelic man amongst the masses of man. Given that there are in fact two modes of functioning if Adam was consistently in angelic mode  the entire sixth day when he was created, it would not be possible in the future to function as a normal man  That is because there is nothing new under the sun. from the six days of creation and afterwards. Consequently the world would not have achieved its purpose.for what it was made. On the other hand if Adam had been created in the second mode i.e. normal man then it would be impossible that angelic man should exist. Because that would constitute a new creation. On the other hand if man did not sin as the result of the influence of the serpent and Eve, it would have been necessary for G-d  to create an additional man who would be normal. This would lead that that the second man  would need to have two creations, in order that the world function properly. All this is alluded to by the verse “These are the developments of heaven and earth when they were created” These are the outcomes of heaven and earth at the time that they were created on the day that they were made… On the very day that they were finished and perfected by means of the change in man upon whom everything depended. Therefore in the Torah it is written Earth and Heaven because the change began from the events on the Earth and from this produced developments in Heaven where is located the supervision and eyes of G-d that track the deeds of man in the world . The Torah then relates how G-d brought about angelic man  who was by his very nature ufit to work the soil  since he was like a heavenly angel. Therefore man was displaced from this exalted state and thus was able to work in the fields and this completed the purpose of the world. It was only then that history began and that the heaven became G-d’s throne and the Earth His footstool and supervision happened according to the deeds of man and the manifrstation of G-d’s attributes. This is G-d’s glory