17 And he reared up the pillars before the temple [erected the Ammudim before the Heikhal], one on the right hand, and the other on the left; and called the name [shem] of that on the right hand [Yachin], and the name [shem] of that on the left Boaz.

The ecclesia in the aggregate is the Pillar of the Stone to be placed in Zion, and a House of Elohim, as Jacob termed the type he set up at Bethel. But while the saints collectively are an Elohal Pillar and House of the truth, this house also contains two classes of pillars, and many individual pillars in each class. This is seen in type and antitype. Typically, the two classes are represented in the Two Brazen Pillars in the Porch of Solomon's temple, the one on the right hand being named Jachin, and that on the left, Boaz.

These names were significative of the things represented by the pillars, which were of brass, eighteen cubits, or about thirty-two feet, in the shaft, which was twenty-one feet girth, and surmounted with a chapiter nine feet high.

Here were loftiness and strength.

The chapiters were ornamented with nets of checker-work, wreaths or stephans, of chain-work, pomegranates, and lily work, all of which were representative of things pertaining to the pillars. As a whole, they were styled yahkin, and boaz, or in plain English, He shall establish by strong ones.

Eureka 3.2.7.