Scripture: Genesis 3:21
The Lord God made garments of skin for Adam and his wife and clothed them.
God made garments of skin to cover Adam and Eve's nakedness. They didn't make the garments; God did.
Where do you think those garments of skin came from?
Garments of skin come from animals. God put animals to death in order to make those skins that covered Adam and Eve's shame in their nakedness. And these garments of skin show us a very important point. They show us how seriously our holy God takes sin. He takes it deathly seriously. It's so serious that it cannot be glossed over or ignored. It can't be smoothed over with a simple apology. It takes death to bring about forgiveness.
Only God could cover Adam and Eve's sin, and He did so by means of sacrifice.
In the same way, God sent Christ to be our sacrifice in order to cover our sin once and for all. We didn't decide to have Christ come for us; God did. God knew that we couldn't cover our own sin and shame. We couldn't do anything to make up for our selfish (sinful) attitudes and actions. He had to do it for us, and He did it by means of the ultimate sacrifice.