“Be it how it will, do right now. Always scorn appearances, and you always may. The force of character is cumulative.”

Source: Notes on Nursing: What It Is, and What It Is Not

Source: Something More, A Consideration of the Vast, Undeveloped Resources of Life (1920), p. 31

How Do You Like Me Now?!, written with Chuck Cannon
Song lyrics, How Do You Like Me Now?! (1999)

"On China's State-Sponsored Amnesia"

Attributed in Civilization's Quotations : Life's Ideal (2002) by Richard Alan Krieger, p. 132, and many places on the internet, this was actually stated by Vincent van Gogh in a letter to Anthon van Rappard http://en.wikipedia.org/wiki/Anthon_van_Rappard (18 August 1885) http://vangoghletters.org/vg/letters/let528/letter.html, also rendered "I keep on making what I can’t do yet in order to learn to be able to do it."
Misattributed
Variant: I am always doing that which I cannot do, in order that I may learn how to do it.

Misattributed to Chateaubriand on the internet and even some recently published books, this statement actually originated with L. P. Jacks in Education through Recreation (1932)
Misattributed
Context: A master in the art of living draws no sharp distinction between his work and his play; his labor and his leisure; his mind and his body; his education and his recreation. He hardly knows which is which. He simply pursues his vision of excellence through whatever he is doing, and leaves others to determine whether he is working or playing. To himself, he always appears to be doing both.

Toast at a dinner in Norfolk, Virginia (April 1816) reported in Niles' Weekly Register (Baltimore, Maryland) 20 April 1816; as cited in Respectfully Quoted: A Dictionary of Quotations (2010), Library of Congress, Congressional Research Service, p. 70
Variant: Our country! In her intercourse with foreign nations, may she always be in the right; but our country, right or wrong.
[emphasis added] This widely quoted version is attributed in Alexander Slidell Mackenzie, Life of Stephen Decatur: A Commodore in the Navy of the United States (1846), C. C. Little and J. Brown, p. 443.
This statement produced the famous slogan "My country, right or wrong!" which itself produced famous responses by:
Carl Schurz "...if right, to be kept right; and if wrong, to be set right."
Schurz, Carl, remarks in the Senate, February 29, 1872, The Congressional Globe, vol. 45, p. 1287. See Wikisource for the complete speech.
G. K. Chesterton "'My country, right or wrong' is a thing that no patriot would think of saying, except in a desperate case. It is like saying, 'My mother, drunk or sober'." -- A Defence of Patriotism
Variant: Our Country! In her intercourse with foreign nations may she always be in the right; but right or wrong, our country!