How we cite our quotes: (Paragraph.Sentence)
Quote #4
We are shaped by every language and culture, drawn from every end of this Earth; and because we have tasted the bitter swill of civil war and segregation, and emerged from that dark chapter stronger and more united, we cannot help but believe that the old hatreds shall someday pass; that the lines of tribe shall soon dissolve. (21.3)
Is diversity about everyone coming together around similarities or celebrating everyone's differences? Obama suggests that it's a little of both. Dissolving "the lines of tribe" suggests that he envisions a post-racial America, but at the same time, he acknowledges that America is a melting pot of cultures. We can do both.
Quote #5
What is required of us now is a new era of responsibility—a recognition on the part of every American that we have duties to ourselves, our nation and the world. (28.2)
Duty and responsibility—sounds familiar. It all recalls JFK's "ask what you can do for your country" speech. This is the one-two punch of optimism and motivational challenge you would expect from an inaugural address. Classic move.