This is a quote by Ayn Rand, in the rest of this anthem she goes on to explain how being part of that we can sometimes be harmful. So the answer is The comparison of the word “We” to limestone helps to develop the theme that a collective society destroys humankind’s potential. You can see this in that bit of the quote when she says it "crushes all beneath it"
'So every day I wove on the great loom, but every night by torchlight I unwove it; and so for three years I deceived the Akhaians.'
Including Keffer's memory helps achieve the author's purpose because the author's purpose is to inform, and this informs the reader about pedestrians, and what they should do! It's important to know what Keffer remembered because it helps achieve the authors' purpose, and adds on to more information mentioned earlier in the text. It also gives us Keffer's point of view!
Judge Brack is a friend of Tesman and his wife, a person who goes to their house a lot. He constantly puts himself into the business and affairs of the tesman, and can even say that with ulterior motives (interest in hedda, tesman's wife). Tesman, for his age, is naive and foolish, always trying to please Hedda, he competes for a professorship, and Brack passed on information about it, to lend him a hand and help him. All this with a hidden desire, the desire to approach Hedda. Lovborg in this triangle, is Tesman's biggest competitor in the academic world. At some point in this story, it is explicit that he and Haddad had a relationship. In that case, the three of them are connected to one person, Heddad. Tesman is aware of the competition with Lovborg, but does not know anything about Judge brack. The role of each of them is 3 men in love with the same woman. Tesman is the one close to Hedda, Judge brack is the one trying to be in the middle of their relationship, and lovborg hides an old relationship with her.
