The inner court is where Sanctification takes place. (The articles of furniture in there involve that). So as we to are cleansed with water (BAPTISM), we enter into His work as His "priests" on earth, His representatives. He is the High Priest in Heaven.
But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people;
1 Peter 2:9
Baptism followed by Sanctification: Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all your idols, will I cleanse you. Ezekiel 36:25
The Purpose: ....and the heathen shall know that I am the LORD, saith the Lord GOD, when I shall be sanctified in you before their eyes. Ezekiel 36:23
As the holy flock,
as the flock of Jerusalem in her solemn feasts;
so shall the
waste cities be filled with flocks of men:
and they shall know that I am the
LORD.
Ezekiel 36:38