Here Moses is depicted as standing before the Face of the Deity and mediating the divine presence to the people. These developments of the motif of standing are intriguing and might constitute the conceptual background of the later identifications of Moses with the office of the angel of the presence. As we saw the idiom of standing also plays a significant part in the Exagoge account that has Moses approach and stand before the throne.The Lord spoke with you face to face at the mountain, out of the fire. At that time I was standing between the Lord and you to declare to you the words of the Lord; for you were afraid because of the fire and did not go up the mountain
In the extra-biblical Mosaic accounts one can also see a growing tendency to depict Moses’ standing position as the posture of a celestial being. Crispin Fletcher-Louis observes that in various Mosaic traditions the motif of Moses’ standing was often interpreted through the prism of God’s own standing, indicating the prophet’s participation in divine or angelic nature. He notes that in Samaritan and rabbinic literature a standing posture was generally indicative of the celestial being. Jarl Fossum points to the tradition preserved in Memar Marqah 4,12 where Moses is described as “the (immutable) Standing One." Think Simon Magus too =the standing one.
In 4Q377 2 vii-xii, the standing posture of Moses appears to be creatively conflated with his status as a celestial being:
And like a man sees li[gh]t, he has appeared to us in a burning fire, from above, from heaven, and on earth he stood on the mountain to teach us that there is no God apart from him, and no Rock like him ... But Moses, the man of God, was with God in the cloud, and the cloud covered him, because [...] when he sanctified him, and he spoke as an angel through his mouth, for who was a messen[ger] like him, a man of the pious ones?