Advertisement Peter Drucker Austrian American consultant, educator, and author (1909-2005) Quotes By Peter Drucker Love The most important thing in communication is hearing what isn't said. Peter Drucker Read more Advertisement Featured Image Credit: George Rose/Getty Images Advertisement recommended articles Unconventional Aging Advice From 10 Centenarians 11 Quotes To Help You Overcome Disappointment Celebrate Earth Day With These 12 Hopeful Quotes An Ode to Spring: 15 Quotes to Welcome the Season Advertisement