Evidently neither you nor Atila read the Bible. Moses did not spend 40 days with Almighty God.
I think you mean to say Moses wasn't in the presence of the burning bush, specifically, for 40 days.
Exodus 24
http://drbo.org/chapter/02024.htm[12] And the Lord said to Moses: Come up to me into the mount, and be there: and I will give thee tables of stone, and the law, and the commandments which I have written: that thou mayst teach them. [13] Moses rose up, and his minister Josue: and Moses going up into the mount of God, [14] Said to the ancients: Wait ye here till we return to you. You have Aaron and Hur with you: if any question shall arise, you shall refer it to them. [15] And when Moses was gone up, a cloud covered the mount.[16] And the glory of the Lord dwelt upon Sinai, covering it with a cloud six days: and the seventh day he called him out of the midst of the cloud. [17] And the sight of the glory of the Lord was like a burning fire upon the top of the mount, in the eyes of the children of Israel. [18] And Moses, entering into the midst of the cloud, went up into the mountain: and he was there forty days, and forty nights.
St. Cyrpian, Treatise 12, Third Book
http://www.newadvent.org/fathers/050712c.htm101. That the Holy Spirit has frequently appeared in fire
In Exodus: "And the whole of Mount Sinai smoked, because God had come down upon it in fire." Also in the Acts of the Apostles"And suddenly there was made a sound from heaven, as if a vehement blast were borne along, and it filled the whole of that place in which they were sitting. And there appeared to them cloven tongues as if of fire, which also settled upon each of them; and they were all filled with the Holy Ghost." Also in the sacrifices, whatsoever God accounted accepted, fire descended from heaven, which consumed what was sacrificed. In Exodus: "The angel of the Lord appeared in a flame of fire from the bush."
St. Hilary of Poitiers, On the Trinity (Book V)
http://www.newadvent.org/fathers/330205.htm23.
(. . .)
Was it not God Who came down into the Mount? Or was it, perhaps, only by a fiction or an adoption, and not by right of nature, that He, Who did all this, bore the name of God? Mark the blare of the trumpets, the flashing of the torches, the clouds of smoke, as from a furnace, rolling over the mountain, the terror of conscious impotence on the part of man in the presence of God, the confession of the people, when they prayed Moses to be their spokesman, that at the voice of God they would die. Is He, in your judgment, not true God, when simple dread lest He should speak filled Israel with the fear of death? He Whose voice could not be borne by human weakness? In your eyes is He not God, because He addressed you through the weak faculties of a man, that you might hear, and live ? Moses entered the Mount; in forty days and nights he gained the knowledge of the mysteries of heaven, and set it all in order according to the vision of the truth which was revealed to him there. From intercourse with God, Who spoke with him, he received the reflected splendour of that glory on which none may gaze? His corruptible countenance was transfigured into the likeness of the unapproachable light of Him, with Whom he was dwelling. Of this God he bears witness, of this God he speaks; he summons the angels of God to come and worship Him amid the gladness of the Gentiles, and prays that the blessings which please Him may descend upon the head of Joseph. In face of such evidence as this, dare any man say that He has nothing but the name of God, and deny His true Divinity?