John Thibaut (1917–1986) American social psychologist
Abstract
The social psychology of groups. 1959
Source: Flow: The Psychology of Optimal Experience
John Thibaut (1917–1986) American social psychologist
Abstract
The social psychology of groups. 1959
Carl Sagan (1934–1996) American astrophysicist, cosmologist, author and science educator
Source: The Dragons of Eden (1977), Chapter 2, “Genes and Brains” (p. 28)
Nigel Cumberland (1967) British author and leadership coach
Source: Your Job-Hunt Ltd – Advice from an Award-Winning Asian Headhunter (2003), Successful Recruitment in a Week (2012) https://books.google.ae/books?idp24GkAsgjGEC&printsecfrontcover&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIGjAA#vonepage&qnigel%20cumberland&ffalse, Managing Teams in a Week (2013) https://books.google.ae/books?idqZjO9_ov74EC&printsecfrontcover&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIIDAB#vonepage&qnigel%20cumberland&ffalse, Secrets of Success at Work – 50 techniques to excel (2014) https://books.google.ae/books?id4S7vAgAAQBAJ&printsecfrontcover&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIJjAC#vonepage&qnigel%20cumberland&ffalse, p.6
Igor Aleksander (1937) scientist
The simple things are hardest (2005)
Stephen R. Covey (1932–2012) American educator, author, businessman and motivational speaker
Source: Principle-Centered Leadership (1992), Ch. 11 : Thirty Methods of Influence
Georges Duhamel (1884–1966) French writer
Source: Défense des Lettres [In Defense of Letters] (1937), p. 22
“Effort only fully releases its reward after a person refuses to quit.”
Napoleon Hill (1883–1970) American author
“Evil happens without effort, naturally, inevitably; good is always the product of skill.”
Charles Baudelaire Le Peintre de la vie moderne
Le mal se fait sans effort, naturellement, par fatalité; le bien est toujours le produit d'un art. <br class="br">XI: "Éloge du maquillage" http://fr.wikisource.org/wiki/%C3%89loge_du_maquillage <br class="br">Le peintre de la vie moderne (1863)