Conditions of Progress in Democratic Government (1909). 
Context: No greater mistake can be made than to think that our institutions are fixed or may not be changed for the worse. … Increasing prosperity tends to breed indifference and to corrupt moral soundness. Glaring inequalities in condition create discontent and strain the democratic relation. The vicious are the willing, and the ignorant are unconscious instruments of political artifice. Selfishness and demagoguery take advantage of liberty. The selfish hand constantly seeks to control government, and every increase of governmental power, even to meet just needs, furnishes opportunity for abuse and stimulates the effort to bend it to improper uses... The peril of this Nation is not in any foreign foe! We, the people, are its power, its peril, and its hope!
                                    
“[A] France or a Belgium is not quite a sovereign nation any more, and thus does not have complete control over its national destiny or foreign relations.”
2010s, Europe at the Edge of the Abyss (2016)
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Victor Davis Hanson 41
American military historian, essayist, university professor 1953Related quotes
“A nation that cannot control its borders is not a nation.”
Thirty Years – 1922-1952 The Story of the Communist Movement in Canada
“Any nation that does not honor its heroes will not long endure.”
                                        
                                        Not by Lincoln, this is apparently paraphrased from remarks about honoring him by Hugh Gordon Miller: "I do not believe in forever dragging over or raking up some phases of the past; in some respects the dead past might better be allowed to bury its dead, but the nation which fails to honor its heroes, the memory of its heroes, whether those heroes be living or dead, does not deserve to live, and it will not live, and so it came to pass that in 1909 nearly a hundred millions of people [...] were singing the praises of Abraham Lincoln." — from [http://www.archive.org/details/reportsons00sonsuoft "Lincoln, the Preserver of the Union" (22 February 1911), an address to the Sons of the Revolution in the State of New York. 
Misattributed
                                    
"World War III and the Liberation Struggle" (1950)
                                        
                                        Ma Ying-jeou (2013) cited in: " Ma defends cross-strait offices proposal http://www.taipeitimes.com/News/taiwan/archives/2013/04/24/2003560582" in The Taipei Times, 24 April 2013. 
Statement made in interview with Chinese-language United Evening News in response to the establishment of reciprocal representative office between Taiwan and Mainland China, in which Taiwan's Straits Exchange Foundation office will be established in Mainland China, while Mainland China's Association for Relations Across the Taiwan Straits office will be established in Taiwan, 23 April 2013. 
Strait issues
                                    
“A nation that can't control its energy sources can't control its future.”
Source: The Audacity of Hope: Thoughts on Reclaiming the American Dream
“Only the sword now carries any weight in the balance for the destiny of a nation.”
                                        
                                        (1914) [Adam Zamoyski, The Polish Way, 1987, 422, John Murray, London, ISBN 0531150690, p. 332] 
Attributed
                                    
“The essential truth of democracy is that each nation determines its own destiny.”
                                        
                                         Barack Obama: "Address to the Ghanaian Parliament in Accra, Ghana," July 11, 2009. Online by Gerhard Peters and John T. Woolley, The American Presidency Project. http://www.presidency.ucsb.edu/ws/index.php?pid=86395&st=&st1= 
2009 
Context: Now, make no mistake: History is on the side of these brave Africans, not with those who use coups or change constitutions to stay in power. Africa doesn't need strongmen; it needs strong institutions. Now, America will not seek to impose any system of government on any other nation. The essential truth of democracy is that each nation determines its own destiny.