Solomon erected two decorative pillars at the entrance of the temple so everyone would be reminded of God.
One pillar was named Jachin, a priest who's name means "God will establish."
This pillar was a reminder that God is in control and He will establish His purposes on the earth.
The other was named Boaz, David's great grandfather who's name means "In God is strength."
This pillar was a reminder that it's not by our strength that we do anything - it's by God's strength!
The temple signified God's presence, so if you were going into the temple you had to pass these two pillars.
They were a reminder of God establishing Israel as a nation and that it was by His strength it was accomplished.
These two represent the bond between king and priest in the establishment of God's kingdom.
The king ruled and took dominion and authority in the establishment of his kingdom.
The priest represented the heart of God to the people and was the vehicle through which people experienced God's grace and mercy.
In the OT they were separate, but in the NT they are one in Jesus - He was the king of kings and the great high priest.
Revelation 3 & 6 reveals that now we are kings and priests as well.
We take dominion and authority to bring God's kingdom on this earth and we represent God to the world.
But we must always remember, it's God's deal to establish it and it's by His strength that we do it.