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Donald J. Trump (1946–), US real estate developer and TV personality
Source: Quoted in 101 Best Ways to Get Ahead (Michael E. Angier, 2004) -
"I sometimes find, and I am sure you know the feeling, that I simply have too many thoughts and memories crammed into my mind. At these times I use the Pensieve. One simply siphons the excess thoughts from one's mind, pours them into the basin, and examines them at one's leisure. It becomes easier to spot patterns and links, you understand, when they are in this form."J. K. Rowling (1965–), British writer
Source: Dumbledore speaking to Harry in Harry Potter and the Goblet of Fire (2000) -
Nancy Kline (1946–), US author, educator, and consultant
Source: Time to Think (1999) -
Anthony Robbins (1960–), US motivational writer and speaker
Source: Awaken the Giant Within (1992) -
"Never waste your attention on matters that have nothing to do with your work … Remember that it is the family business that must not be neglected for a moment."Mitsui Takafusa (1684–1748), Japanese merchant
Source: Quoted in Premodern Japan: A Historical Survey (Mikiso Hane, 1991) -
"When conscious activity is wholly concentrated on some one definite purpose, the ultimate result, for most people, is lack of balance accompanied by some form of nervous disorder."Bertrand Russell (Earl Russell) (1872–1970), British philosopher and writer
Source: Quoted in Management by Objectives: An Integrated Approach (S. K. Chakraborty, 1976) -
"Intense concentration for hour after hour can bring out resources in people that they didn't know they had."Edwin Land (1909–1991), US inventor and founder of Polaroid Corporation
Source: Forbes (June 1975)

