The Holy of Holies was the innermost, most sacred sanctuary of the Tabernacle and Solomon’s Temple, believed to be the earthly dwelling place of God’s presence. It housed the Ark of the Covenant and was restricted to the High Priest, who entered only once a year on Yom Kippur to aton for sins. -- AI
We are tabernacles.
Our Holy Of Holies is our spirit which was corrupted by Original Sin. In the New Birth our Holy Of Holies becomes occupied by the Holy Spirit so that we are New Spirit beings who are One with Christ.
It is the Holy Spirit in our Holy Of Holies that makes us saved.
But what about the rest of our tabenacle - the Holy Place and the Outer Court?
To answer this question click on Tabernacle .