“There is nothing inherently expensive about rockets. It's just that those who have built and operated them in the past have done so with horrendously poor efficiency.”
Conversation: Elon Musk on Wired Science (2007)
Variant: There is nothing inherently expensive about rockets. It's just that those who have built and operated them in the past have done so with horrendously poor efficiency.
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Elon Musk 91
South African-born American entrepreneur 1971Related quotes

“There is nothing so useless as doing efficiently that which should not be done at all.”

Shadwell, The Life of Colin Campbell, Lord Clyde. Vol. I, 108.

Variant: There is nothing so useless as doing efficiently that which should not be done at all.

Al - Jazeera Broadcast Tape - On 9/11 and the American reaction http://www.youtube.com/watch?v=dls5JTD-uG0 (The date of this tape is not provided, though it seems to be 2002 or 2003, but could be as early as October 2001.)
2000s

Introduction.
Garden Cities of To-morrow (1898)
Context: Whatever may have been the causes which have operated in the past, and are operating now, to draw the people into the cities, those causes may all be summed up as "attractions "; and it is obvious, therefore, that no remedy can possibly be effective which will not present to the people, or at least to considerable portions of them, greater "attractions " than our cities now possess, so that the force of the old "attractions" shall be overcome by the force of new "attractions" which are to be created. Each city may be regarded as a magnet, each person as a needle; and, so viewed, it is at once seen that nothing short of the discovery of a method for constructing magnets of yet greater power than our cities possess can be effective for redistributing the population in a spontaneous and healthy manner.

“History is nothing whatever but a record of what living persons have done in the past.”
Give Me Liberty (1936)
Source: Public Finance - International Edition - Sixth Edition, Chapter 5, Externalities, p. 79

Source: (1776), Book V, Chapter I, Part II, 775.