“Investment is most intelligent when it is most businesslike.”
Benjamin Graham book The Intelligent Investor
Source: The Intelligent Investor (1973) (Fourth Revised Edition), Chapter 20, "Margin of Safety": The Central Concept, p. 286
Compare: It’s a point so blindingly obvious that only an extraordinarily clever and sophisticated person could fail to grasp it.
John Bercow, 2016.
General sources
Variant: There is no limit to the amount of intelligence invested in ignorance when the need for illusion runs deep.
Source: To Jerusalem and Back: A Personal Account (1976), p. 127
“Investment is most intelligent when it is most businesslike.”
Benjamin Graham book The Intelligent Investor
Source: The Intelligent Investor (1973) (Fourth Revised Edition), Chapter 20, "Margin of Safety": The Central Concept, p. 286
Christopher Hitchens (1949–2011) British American author and journalist
Source: god is Not Great: How Religion Poisons Everything
Daniel J. Boorstin book The Discoverers
The Discoverers: A History of Man's Search to Know His World and Himself, Random House, 1983, p. 86.
Daniel J. Boorstin (1914–2004) American historian
This "aphorism" was expressed in different forms by Josh Billings and Socrates. note: Often misquoted as, "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge," and often misattributed to Stephen Hawking.
Source: Cleopatra's Nose: Essays on the Unexpected (1995).
Richard J. Foster (1942) American Quaker theologian
Source: Celebration of Discipline: The Path to Spiritual Growth
Warren Buffett (1930) American business magnate, investor, and philanthropist
As quoted in Homespun Wisdom from the "Oracle of Omaha" by Amy Stone in BusinessWeek (5 June 1999) http://www.businessweek.com/1999/99_27/b3636006.htm
Donald J. Trump (1946) 45th President of the United States of America
2010s, 2015, Presidential Bid Announcement (June 16, 2015)
“[…]financial intelligence is a synergy of accounting, investing, marketing and law.”
Robert T. Kiyosaki (1947) American finance author , investor
Rich Dad Poor Dad: What the Rich Teach Their Kids About Money-That the Poor and the Middle Class Do Not!