Members of the Church of Jesus Christ of Latter-Day Saints have a modern temple worship that hearkens back to the temples of the Old Testament. The events of this section of Exodus are forerunners of Israelite temple worship. There were two main ideas that struck me related to temples from these chapters.
1. The intention when Moses brought the House of Israel to Sanai was so they could become "a kingdom of priests, and an holy nation." (Exodus 19:6). More than that, the Lord wanted to show himself to the people "for the third day the LORD will come down in the sight of all the people upon mount Sanai." (Exodus 19:11). The people washed their clothes and purified themselves, and then came to the base of the mountain, but when they saw the lightning and thunders and fire on the mountain, they were afraid, "and they stood at the nether part of the mount." That is not the best translation. What it really says is they stood a ways off, or in other words, they weren't willing to go forward. It was too scary. The LORD told Moses to set bounds, and no one was thereafter allowed to go up and speak with the LORD except Moses. This practice was continued when the Israelites set up their tabernacle, and later the temple. The general population could come to the outer court, but only the high priest could come into the Holy of Holies, and only on the Day of Atonement. The goal of making a kingdom os priests was set aside, and a limited priesthood was set up lead by Aaron and the Levites.When Joseph Smith established temple worship once again, he fulfilled the Lord's original purpose at Sanai. In modern LDS temples, people are washed and purified symbolically, and then led, step by step back into the presence of God. On the way they are ordained to become priests and priestesses. The LORD, at last, has his "kingdom of priests" who can all enter his presence.