“There is zero correlation between being the best talker and having the best ideas.”

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

"The Supreme Court in the Mirror of Justice," University of Pennsylvania Law Review (April, 1957), p. 786.
Other writings

Source: Tribes: We Need You to Lead Us

Conflict Is Not Abuse: Overstating Harm, Community Responsibility, and the Duty of Repair (2016)

Academy of Achievement interview (1991)
Context: The idea of being constructive, creative, positive, in trying to bring out the best in one's own self and the best in others follows from what I've just been saying. Again, I repeat my belief in us, in ourselves, as the product of the process of evolution, and part of the process itself. I think of evolution as an error-making and error-correcting process, and we are constantly learning from experience. It's the need to dedicate one's self in that way, to one's own self, and to choose an activity or life that is of value not only to yourself but to others as well.

Guerrero, Aaron (interviewer), "Introvert Susan Cain Explains Why Shy People Thrive at Work," U.S. News and World Report, October 3, 2013

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 35.

As quoted in The Mammoth Book of Zingers, Quips, and One-Liners (2004) by Geoff Tibballs, p. 264
2000s and attributed from posthumous publications