A man showed Ezekiel the different parts of the temple, including the sanctuary itself, and that meant giving the dimensions of the first thing that Ezekiel would approach, which would be the doorposts and the entry.
Then the prophet wrote,
“He measured the length, twenty cubits; and the width, twenty cubits, beyond the sanctuary; and he said to me, ‘This is the Most Holy Place’” (Ezekiel 41:4).
That stood out in my mind, to hear this man saying to the prophet, “This is the Most Holy Place.”
God is holy, and so where He dwells, must be holy, purified by what God tells man to do, but also by the very fact that God is there. God also dwells in the heart of those whose hearts are broken by their sin, the exact opposite of holiness, because a requirement of God’s dwelling presence is humility.