“New things always have to experience difficulties and setbacks as they grow. It is sheer fantasy to imagine that the cause of socialism is all plain sailing and easy success, without difficulties and setbacks or the exertion of tremendous efforts.”
On the Correct Handling of Contradictions Among the People
Source: (zh-CN) 任何新生事物的成长都是要经过艰难曲折的。在社会主义事业中,要想不经过艰难曲折,不付出极大努力,总是一帆风顺,容易得到成功,这种想法,只是幻想。
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Mao Zedong 181
Chairman of the Central Committee of the Communist Party of… 1893–1976Related quotes

ARTnews annual, Volume 31, Art Foundation, 1966, p. 56
1960s

Source: Belonging: A Culture of Place

“The road to freedom is a difficult, hard road. It always makes for temporary setbacks.”

“I seem to be having tremendous difficulty with my life-style”
Source: The Hitchhiker's Guide to the Galaxy

The Education of Henry Adams (1907)

“Having encountered many setbacks, Havel lived with a spirit of hope”
Statement of President Obama on the death of Vaclav Havel (18 December 2011) http://www.whitehouse.gov/the-press-office/2011/12/18/statement-president-obama-death-vaclav-havel
2011
Context: Having encountered many setbacks, Havel lived with a spirit of hope, which he defined as “the ability to work for something because it is good, not just because it stands a chance to succeed.” His peaceful resistance shook the foundations of an empire, exposed the emptiness of a repressive ideology, and proved that moral leadership is more powerful than any weapon. He played a seminal role in the Velvet Revolution that won his people their freedom and inspired generations to reach for self-determination and dignity in all parts of the world.