3 Bible Verses about Metaphorical Pillars

I am writing this to you in case I should be detained, to let you see how you ought to behave in the household of God??he Church of the everliving God, the pillar and mainstay of the truth.

He that overcomes, I will make him a pillar in the temple of my God; and he shall go out from it nevermore. And I will write upon him the name of my God, and the name of the city of my God, the new Jerusalem, which is coming down from my God out of heaven, and my own new name.

and when they recognized the grace which had been given to me, James and Cephas and John, then thought to be pillars, gave to Barnabas and to me the right hand of fellowship. They agreed that we should go to the Gentiles and they to the Jews.