The Ark of the Covenant typifies Christ—Head and Body. In order to be a mature member of the Body of Christ we have to be born of God; purified from all sin and self-will; have Christ formed in us; and then have God in His Fullness dwell eternally in that which has been formed in us. 
We are to live by the body and blood of Christ, just as He lives by the Father. Thus we always are doing God's will. 
Such are the members of the Royal Priesthood. 
Every time we obey Christ, that particular obedience is carved in our mind and heart as an eternal law. What a reward for being obedient—to be transformed into the Word of God! 
In our heart is being created the iron righteousness of God, the hidden manna (the body and blood of Christ), and arising from our death our eternal role as a member of the Royal Priesthood. 
When we become the Ark of the Covenant, we are covered without and within by the Divine Nature, and overshadowed by the Cherubim of Glory. 
Because we are being created the Ark of the Covenant, we always are in motion, We always are being formed in the image of God, because His Seed has been planted in us.