Atonement

In Leviticus chapter 9, Aaron offers a sin offering, a burnt offering (verse 3), a peace offering and a grain offering (verse 4) to the Lord. The rites had been given to Moses and Aaron and they followed the prescription. The culmination of the service is in verses 23 and 24:

Moses and Aaron then went into the Tent of Meeting. When they came out, they blessed the people; and the glory of the LORD appeared to all the people. Fire came out from the presence of the LORD and consumed the burnt offering and the fat portions on the altar. And when all the people saw it, they shouted for joy and fell facedown.

Chapter 10 begins with the account of Nadab and Abihu (Aaron's sons) offering unauthorized fire before the Lord:

Aaron's sons Nadab and Abihu took their censers, put fire in them and added incense; and they offered unauthorized fire before the LORD, contrary to his command. So fire came out from the presence of the LORD and consumed them, and they died before the LORD. Moses then said to Aaron, "This is what the LORD spoke of when he said: "'Among those who approach me I will show myself holy; in the sight of all the people I will be honored.'" Aaron remained silent.

The animals died because of the people's sin (ch 9). God's glory shown and fire consumed the animals. Then Nadab and Abihu die for their sin and fire consumed them (ch 10).

Do you WANT a substitute for your sins?
Or do you want to approach the Lord "as you please" but without a substitute?

God offers the substitute of Jesus Christ.
Why, oh why, would you profane Christ and not cling to him as your hope?

I heard it said that
"Hell is eternity in the presence of God"
"Heaven is eternity in the presence of God with a mediator "(Jesus)