Just a little reminder that when Moses was up on the Mount asking to see God's face, He gave him a little taste, like a lick off the spoon, of what was cooking. And it's going to be hot in the kitchen! Meanwhile, back on the ranch, Aaron and the people were getting bored, ignoring the smoking hot mountain. Remember the first time their leader went up on the mountain, the people were sure that Moses was toast? That's when they had begged for something else to worship, something they could dance around in the midst of the big orgy they were planning. It resulted in Moses throwing down the Ten Commandments because they were breaking most of them already.
We are right there in the desert. Are we going to have holy fear or party on? These were God' children. But in spite of Moses seeing God' glory, they belittled and ignored it. This is even when they were lead by a pillar of cloud and a pillar of fire, just a hint of what was up on the mountain. Hard to ignore, isn't it, right there in front of their face every day.
Now Jesus, the very glory of God Himself, came down, not from a mountain but from heaven. Most people still ignore Him. But it's hard to ignore someone who either makes you love Him or hate Him, so they killed Him. He was not in the form of the idol they preferred to worship because He was to be the sacrifice when they preferred the shape of a cow. Still today, with all the revelation we have of the New Testament, not to mention the gift of the Holy Spirit, people are still choosing to ignore God choosing rather to belittle the Word of God, and worshiping idols of one kind or another chosen by themselves as the intelligentsia. (Sometimes the idol is gold in the round shape of coins.) Sometimes it is in the form of choosing power, thinking they are taking over the place of leadership, not of Moses, but of God's Son Himself.
So when the earth and heaven are shaken, only one thing will remain, the kingdom of God. We are to approach it with reverence and awe. Umm. Have we experienced much reverence and awe lately. How about fear and trembling? I guarantee, that when that time comes, we will fall on our knees desiring nothing but to serve the Lord our God joining the angels saying, "Holy, Holy, Holy."
We should never forget, our God is consuming fire. John Wesley says that "...the man...will find that fire to consume him which would otherwise have consume his sin." Hmm. Wouldn't you rather have your sins consumed than become toast yourself.