and sight is so awesome that the people tremble as Moses leads them to the base of the mountain where their mediator speaks to God (Exod. 19:16–19). Second, I AM summons Moses to ascend by himself only to return to repeat to the people that the mountain is off-limits to everyone else (vv. 20–23). Third, after his descent I AM summons Moses yet a second time that morning to ascend, but this time with Aaron. The striking contrast between the unique approaches of Moses and then of Aaron and the setting
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