Christ is the sinner's propitiatory cover, The conscience is at peace in Jesus Christ. It is a supernatural matter that the believer knows that Christ died for him and is at peace.
The blood of Christ is the emblem of His death.
We are to picture that His blood is sprinkled for us on the propitiatory cover to satisfy the requirements of God's righteousness.
The KJV called this place on the ark "the mercy seat".
Believing in the redeeming blood of Christ supernaturally puts the spiritual being at peace. We can sense God asking “My child, are you happy?”. And we knowing that deep within that He has carried away our sins may respond, “Yes, yes, I am very happy, Father.”
I believe God is even happier. It may require eternity to know how happy the Father is to have his lost creatures back as His dear children.
There can be the experiential enjoyment of Christ as the propitiatory cover on the ark of the testimony. We may enjoy intimate fellowship with God. Christ becomes a whole realm and a whole sphere of peace with God.
This is also a life changing peace. This can be am empowering peace transforming the way we live.
This vision of Christ as the ark with the propitiatory cover is wonderful and inexhaustible. I hope that after hearing of such a Christ, the Christ who lives in you will become much more precious to you than ever before. The Christ who dwells in us is not simply the Lamb; He is the ark with the cap, the top part. He is the all-inclusive Christ living in us for our continual enjoyment and experience. Because we have such a Christ, we need not be troubled by anything. God's righteousness does not condemn us. On the contrary, His glory justifies us, and God Himself is happy, knowing that everything between us and Him is in harmony and that we can freely enjoy a mutually satisfying fellowship.
From
Life Study of Exodus by Witness Lee
https://www.ministrybooks.org/SearchMinBooksDsp.cfm?id=22C34C2BF5