12 And thou shalt set bounds unto the people round about, saying, Take heed to yourselves, that ye go not up into the mount, or touch the border of it: whosoever toucheth the mount shall be surely put to death:

13 There shall not an hand touch it, but he shall surely be stoned, or shot through; whether it be beast or man, it shall not live: when the trumpet soundeth long, they shall come up to the mount.

In addition to their steps of purification, the Israelites were instructed that they not come too close to the mountain when the glory of the Lord was upon it. They would be permitted to hear His voice, but that did not mean that they could abide touching His presence directly.

This is an interesting notion, one that is visited again later when Uzzah, the Israelite, reaches out to steady the ark and is immediately struck dead (2 Samuel 6:6-7). What is it about the Lord’s presence that people must not come too near, on pain of death?

I see in this a lesson that total godliness is too great for us to endure. It is too bright, it is too pure, it is too glorious, such that it condemns our perverse, fallen flesh. We are like particles of dust that immolate from the heat around the fire, even before we touch the flame. That buffer of disintegrating heat ensures that nothing impure ever touches that perfect light.

This is why each of us must be purified in our hearts before we meet the Father, why we must have our corruptible flesh replaced by an immortal body, why Moses had to be transfigured for his own up-close encounter with the Lord. We require a divine intermediary between us to interact with God, because His glory is literally too much for us to handle!