
Source: Modern economic growth,(1966), p. 1, as cited in: Amitava Krishna Dutt, Jaime Ros (2008) International Handbook of Development Economics. p. 48; Definition of "modern economic growth"
In a letter to Beatrice (22 August 1943), published in The Patton Papers 1940-1945 (1996) edited by Martin Blumenson https://books.google.com/books?id=eV2pRL7arKkC&pg=PT239&dq=Moral+courage+is+the+most+valuable+and+usually+the+most+absent+characteristic+in+men.&hl=en&sa=X&ved=0ahUKEwjPrbHtvsXVAhXBRyYKHUz6CAw4ChDoAQhCMAU#v=onepage&q=Moral%20courage%20is%20the%20most%20valuable%20and%20usually%20the%20most%20absent%20characteristic%20in%20men.&f=false
Source: Modern economic growth,(1966), p. 1, as cited in: Amitava Krishna Dutt, Jaime Ros (2008) International Handbook of Development Economics. p. 48; Definition of "modern economic growth"
“time is the most valuable thing that we have, because it is the most irrevocable.”
Variant: Time is the most precious gift in our possession, for it is the most irrevocable.
Source: As quoted in LIFE magazine (22 April 1957), p. 152; also in Letters and Papers from Prison (1967), p. 47.
Context: Time is the most precious gift in our possession, for it is the most irrevocable. This is what makes it so disturbing to look back upon the time which we have lost. Time lost is time when we have not lived a full human life, time unenriched by experience, creative endeavor, enjoyment, and suffering. Time lost is time not filled, time left empty.
Letter to John Jay (23 August 1785); published in The Papers of Thomas Jefferson (1953), edited by Julian P. Boyd, vol. 8, p. 426
1780s
“Impossible gadgets are always the most valuable.”
Source: The Heritage Universe, Divergence (1991), Chapter 16 (p. 433)
Said to portrait painter Samuel Johnson Woolf, cited in Here am I (1941), Samuel Johnson Woolf; this has often been abbreviated: Most writers regard truth as their most valuable possession, and therefore are most economical in its use.
Context: A critic never made or killed a book or a play. The people themselves are the final judges. It is their opinion that counts. After all, the final test is truth. But the trouble is that most writers regard truth as their most valuable possession and therefore are most economical in its use.
“Our most valuable and most instructive materials in the history of man are treasured up in India.”
Max Müller, India: What Can India Teach Us? (1883), p. 15 http://books.google.com/books?id=pIVDAAAAYAAJ&pg=PA15&dq=%22most+valuable+and+most+instructive+materials+in+the+history+of+man+are+treasured+up+in+India%22
Misattributed
Source: The Purpose Driven Life: What on Earth Am I Here for?