“Success always demands a greater effort.”
Source: Their Finest Hour
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Winston S. Churchill 601
Prime Minister of the United Kingdom 1874–1965Related quotes

“The greater the effort, the greater the glory.”
Plus l'effort est grand, plus la gloire en est grande.
Pauline, act IV, scene v.
Polyeucte (1642)
Variant: The greater the effort, the greater the glory.

Remarks by President Obama and President Kenyatta of Kenya in a Press Conference at Kenyan State House in Nairobi, Kenya (July 25, 2015) https://www.whitehouse.gov/the-press-office/2015/07/25/remarks-president-obama-and-president-kenyatta-kenya-press-conference
2015

Source: Quest for prosperity: the life of a Japanese industrialist. 1988, p. 58

“Men judge us by the success of our efforts. God looks at the efforts themselves.”
This quote is sometimes pointing Brontë as the author, but is is originally attributed to Richard Whately, first quoted in The Railroad Telegrapher, Volume 18 (1901), Order of Railroad Telegraphers, page 713.
Disputed
“Live your vision and demand your success.”
Source: Life, the Truth, and Being Free (2010), p. 26

Source: Justice and Fraternity (1848), p. 319
Context: "[The socialists declare] that the State owes subsistence, well-being, and education to all its citizens; that it should be generous, charitable, involved in everything, devoted to everybody;... that it should intervene directly to relieve all suffering, satisfy and anticipate all wants, furnish capital to all enterprises, enlightenment to all minds, balm for all wounds, asylums for all the unfortunate, and even aid to the point of shedding French blood, for all oppressed people on the face of the earth.
Who would not like to see all these benefits flow forth upon the world from the law, as from an inexhaustible source? … But is it possible? … Whence does [the State] draw those resources that it is urged to dispense by way of benefits to individuals? Is it not from the individuals themselves? How, then, can these resources be increased by passing through the hands of a parasitic and voracious intermediary?
... Finally…we shall see the entire people transformed into petitioners. Landed property, agriculture, industry, commerce, shipping, industrial companies, all will bestir themselves to claim favors from the State. The public treasury will be literally pillaged. Everyone will have good reasons to prove that legal fraternity should be interpreted in this sense: "Let me have the benefits, and let others pay the costs." Everyone's effort will be directed toward snatching a scrap of fraternal privilege from the legislature. The suffering classes, although having the greatest claim, will not always have the greatest success.
“Defeating the infidels requires a much greater effort. It requires the mobilization of the nation.”
Source: http://www.memritv.org/Transcript.asp?P1=36 The big explosion will come] April 2004.