„Quando você quer ajudar as pessoas, conte a verdade. Quando você quer ajudar a si próprio, conte o que elas querem ouvir.“
When you want to help people, you tell them the truth. When you want to help yourself, you tell them what they want to hear.
Barbarians Inside the Gates and Other Controversial Essays, Página 246 https://books.google.com.br/books?ei=1xlWVbS1IsawggTq5YG4DA&hl=pt-BR&id=VX0aAQAAIAAJ&dq=thomas+sowell+Barbarians+Inside+the+Gates&focus=searchwithinvolume&q=%22When+you+want+to+help+people%2C+you+tell+them+the+truth.+When+you+want+to+help+yourself%2C+you+tell+them+what+they+want+to+hear.%22, Hoover Institution Press, 1999