Yes that is true, Christ is God's Sanctuary in the Heavens. We, joined to Christ, are also God's sanctuary. It is for this purpose that He made us in His own image. Everything in the design of the earthly sanctuary is an aspect of Christ. Which is not surprising since Christ is all, and in all Col 3:11
There was the outer court, holy place and holy of holies, this is a sanctuary built by man. God has created us with 3 parts.. body, soul, spirit..this is a sanctuarybuilt by God. Christ also has 3 parts.. body, soul, spirit. What is the Sanctuary in the Heavens? This is the dwelling place of God built by Him. We and Christ as one married couple (Christ the husband, church the wife) are the dwelling place of God in the heavens through our body, soul and spirit. God created us as vessels, to be His dwelling place. God is the treasure in our earthen vessels: 2 Cor 4:7 "But we have this treasure in earthen vessels, so that the surpassing greatness of the power will be of God and not from ourselves;"
Outer court has the altar and the basin.
Holy Place has the show bread , lampstand and incense altar.
The Holy of Holies has the ark of the testimony. In the ark was manna, budding rod, and the
stone tablets of law.
Each of these has deep significance of Christ. So we discuss a few...
Incense altar signifies our prayers offered up to God and Christ who ever intercedes for us. When Jesus said the Father wants us worship Him in spirit and in truth..(John 4:24), he meant He wants us to come into the Holy of Holies.. into our spirit where the Spirit dwells. We move from our soul into our spirit by prayer, as signified by the incense altar. But we are not just offering any old incense.. the only incense that is a sweet fragrance pleasing to God is Christ. We are not praying by ourselves.. we are praying with Christ, and our prayers are acceptable to God because of Christ in our praying. This is "praying in the Spirit".
The ark of the testimony signifies Christ. Our testimony is what we have experienced. The ark of the testimony is what we have experienced of Christ.
In Revelation 2:17 Jesus said he will give this manna to those who overcome.
The manna was for giving life to the Israelites. The manna signifies Christ as the bread of life who came out from Heaven. By eating Christ as the bread of life is how we have life in ourselves (John 6:53). We note that Jesus did not want us to only learn from Him, but to eat Him. Teaching and learning is external, outside of us.. but whatever we eat goes inside of us, nourishes us, and we 'become what we eat'. Whatever we eat goes into us, is digested, processed, and then becomes part of our beings. Here is deep significance about why we must eat Christ for life, and not merely learn about Him or follow letters of law which results in death. Death is the absence of life, and is the result of not eating Christ.
The budding rod was placed in the ark as a sign after the Israelites rebellion. A rod is a dead piece of wood used for correction, beating. The budding rod signifies something of life coming out of something dead. The budding rod signifies Christ's resurrection. In our experience we are resurrected with Christ ( Colossians 3:1). Many Christians want to live crucified life, live in crucifixion, but we are to live according to Christ's resurrection. Resurrection signifies victory over death, satan, sickness, sin, world all of these things. Resurrection implies separation, sanctification, holiness. In resurrection we have our living not in the world of flesh and sin but in the heavens with Christ. All of this has taken place in our regenerated spirit by accomplished fact (past) and is taking place in our transformed soul by our experience (present), and our glorified bodies will also be completely free from the indwelling flesh of sin (in future).