Even Moses standing before a burning bush was reminded by God almighty that he need not approach in haste or to consider the ground where God had chosen to meet with Moses as ordinary. Moses was cautioned to keep his distance and to remove his sandals. God declared who He was and Moses hides his face from God because Moses is afraid.
“But those sacrifices are an annual reminder of sins, because it is impossible for the blood of bulls and goats to take away sins. Day after day every priest stands and performs his religious duties; again and again he offers the same sacrifices, which can never take away sins. But when this priest had offered for all time one sacrifice for sins, he sat down at the right hand of God. Since that time he waits for his enemies to be made his footstool, because by one sacrifice he has made perfect forever those who are being made holy.”