"An introverted call to action: Susan Cain at TED2012," TED, February 28, 2012.
Works

Bittersweet
Susan CainFamous Susan Cain Quotes
Guerrero, Aaron (interviewer), "Introvert Susan Cain Explains Why Shy People Thrive at Work," U.S. News and World Report, October 3, 2013
"Introverts run the world -- quietly," CNN.com, March 18, 2012.
“This is the next great diversity issue of our time.”
Walsh, Colleen (staff writer), "Women in the law" article re "Celebration 60" event, Harvard Gazette, September 30, 2013. (Quotation referring to introversion and extroversion)
Variant: I'm seeing businesses embrace the Quiet Revolution as the next great diversity issue of our time.
"The quiet strength of the introvert," The Chicago Tribune, February 20, 2012.
“I prefer listening to talking, reading to socializing … I like to think before I speak”
softly
"Susan Cain: Quiet revolutionary" speaker profile at TED.com, February 2012 (est.)
Susan Cain Quotes about personality
"An introverted call to action: Susan Cain at TED2012," TED, February 28, 2012.
Bielski, Zosia (interviewer), "Giving introverts permission to be themselves," The Globe and Mail, January 26, 2012.
Cornish, Audie (interviewer), "Quiet, Please: Unleashing 'The Power Of Introverts'," NPR, January 30, 2012.
"Why the world needs introverts," The Guardian, March 13, 2012.
"Revenge of the introverts: It's often assumed extroverts do best in life, but a new book reveals quite the opposite... ," The Daily Mail, March 25, 2012.
Bittersweet Introduction at p. xxxiii
Susan Cain Quotes about ideas and thoughts
Cook, Gareth (interviewer), "The Power of Introverts: A Manifesto for Quiet Brilliance," Scientific American, January 24, 2012.
“There is zero correlation between being the best talker and having the best ideas.”
Downey, Maureen (interviewer), "Teaching introverts: Do schools prefer big talkers to big thinkers?", The Atlanta Journal-Constitution, May 5, 2016.
"The Rise of the New Groupthink," Opinion section of The New York Times, online January 13, 2012; in print January 15, 2012.
“We need systems that reward the best ideas, not the best presenters.”
Guerrero, Aaron (interviewer), "Introvert Susan Cain Explains Why Shy People Thrive at Work," U.S. News and World Report, October 3, 2013
Susan Cain: Trending quotes
"Susan Cain: Quiet revolutionary" speaker profile at TED.com, February 2012 (est.)
Essay: "An Introvert Steps Out," "Sunday Book Review" section of The New York Times, online April 27, 2012 and in print April 29, 2012.
“Solitude matters, and for some people it is the air that they breathe.”
"Susan Cain: Quiet revolutionary" speaker profile at TED.com, February 2012 (est.)
Susan Cain Quotes
Bielski, Zosia (interviewer), "Giving introverts permission to be themselves," The Globe and Mail, January 26, 2012.
“Our culture rightly admires risk-takers, but we need our “heed-takers” more than ever.”
Manifesto, ThePowerOfIntroverts.com, January 2012 (est).
Cook, Gareth (interviewer), "The Power of Introverts: A Manifesto for Quiet Brilliance," Scientific American, January 24, 2012.
“One honest relationship can be more productive than fistfuls of business cards.”
"Revenge of the introverts: It's often assumed extroverts do best in life, but a new book reveals quite the opposite... ," The Daily Mail, March 25, 2012.
Cain's second TED Talk, "Announcing the Quiet Revolution," March 2014.
Hughey, Aaron W. (book reviewer), "Book review: ‘Quiet’ suggests introverts are undervalued by society," The Daily News (Kentucky; BGDailyNews.com), July 15, 2012.
Manifesto, ThePowerOfIntroverts.com, January 2012 (est).
“I look back on my years as a Wall Street lawyer as time spent in a foreign country.”
"The quiet strength of the introvert," The Chicago Tribune, February 20, 2012.
“Love is essential, gregariousness is optional.”
Manifesto, ThePowerOfIntroverts.com, January 2012 (est).
"Susan Cain: Quiet revolutionary" speaker profile at TED.com, February 2012 (est.)
“We (introverts) are not anti-social; we’re differently social.”
Cook, Gareth (interviewer), "The Power of Introverts: A Manifesto for Quiet Brilliance," Scientific American, January 24, 2012.
Glor, Jeff (interviewer), "Quiet: The Power of Introverts in a World That Can't Stop Talking," by Susan Cain," CBS News, January 26, 2012.
"Introverts run the world -- quietly," CNN.com, March 18, 2012.
"Revenge of the introverts: It's often assumed extroverts do best in life, but a new book reveals quite the opposite... ," The Daily Mail, March 25, 2012.
Bastian, Jonathan (host). "Bittersweet: Susan Cain on the joy of sweet sorrow". KCRW.com (Los Angeles). May 21, 2022.
“Our difficulty accepting impermanence is the heart of human suffering.”
Bittersweet, Chapter 8 at p. 181
“How did a nation founded on so much heartache turn into a culture of normative smiles?”
Bittersweet, Chapter 5, title, at p. 117
Bittersweet, Chapter 3 at p. 61
“Whatever pain you can't get rid of, make it your creative offering.”
Bittersweet, Chapter 3 at p. 56
“We like art forms that express our longing for union, and for a more perfect and beautiful world.”
Bittersweet, Chapter 2 at p. 36
Bittersweet, Chapter 2 at p. 36
Bittersweet Introduction at p. xxviii
Bittersweet Introduction at p. xxiii
Mineo, Liz (interviewer), "That feeling you get when listening to sad music? It's humanity", The Harvard Gazette, May 11, 2022.
“Human beings are a meaning-making species.”
Walker, Suzy (interviewer). "The Big Happiness Interview: Susan Cain on how embracing sadness can make us happier", Metro, June 5, 2022.
Bittersweet
Walker, Suzy (interviewer). "The Big Happiness Interview: Susan Cain on how embracing sadness can make us happier", Metro, June 5, 2022.
Bittersweet
Bittersweet Introduction at p. xxvi