One of the names used to describe the Kodesh Hakodashim, the holiest space within the Beis Hamikdash, is the Cheder Hamitos – literally the bedroom.
In their home, husband and wife interact in different rooms and settings. But in their bedroom they express and experience their exclusive bond in the most powerful way. There are no others and nothing outside of the relationship present. Here they are and truly one.
The purpose of the Beis Hamikdash is for Hashem’s presence to rest amongst the Jewish people, ושכנתי בתוכם. The relationship of Hashem and the Jewish people is likened to that of husband and wife.
We connect to Hashem and He unites with us through the various Temple services performed in the courtyards and chambers of the Beis Hamikdash. But the deepest union of absolute oneness between Hashem and His bride, is the experience of the Kodesh Hakodashim.
Like the Kodesh Hakodashim which lay deep within the Beis Hamikdash, deep inside of us, the essence of our soul, the Kodesh Hakodashim of our Neshama, is one with Hashem.
On Yom Kippur, the only day on which this room was accessed, we get to sense this deep oneness. Our Avodah is to draw it down and live with it every day in everything that we do.