„Excellence is not an exception, it is a prevailing attitude.“
This evokes Will Durant's famous summation of Aristotle: "Excellence then is not an act, but a habit."
2000s, The Powell Principles (2003)
Contexto: If you are going to achieve excellence in big things, you develop the habit in little matters. Excellence is not an exception, it is a prevailing attitude.
Citas similares

— Raymond Poincaré 10th President of the French Republic 1860 - 1934
Diary entry (2 August 1914), quoted in John Keiger, 'France' in Keith Wilson (ed.), Decisions for War 1914 (London: University College London Press, 1995), p. 136.

— Don Soderquist 1934 - 2016
Don Soderquist “ Live Learn Lead to Make a Difference https://books.google.com/books?id=s0q7mZf9oDkC&lpg=pg=PP1&dq=Don%20Soderquist&pg=PP1#v=onepage&q&f=false, Thomas Nelson, April 2006 p. 58.
On Doing Things Right
— Ronald Knox English priest and theologian 1888 - 1957
Let Dons Delight (1939), Note on Chapter 8
Describing a discussion following the presentation of a paper at a student society.
— Tom Peters, libro In Search of Excellence
Fuente: In Search of Excellence (1982), p. 75.

— Adam Smith Scottish moral philosopher and political economist 1723 - 1790
Fuente: (1776), Book II, Chapter V, p. 402.
— Paul Newman American actor and film director 1925 - 2008
Quoted in "Paul Newman's Road To Glory", interview with Paul Fischer, Film Monthly (2002-07-01)

— Martin Luther King, Jr. American clergyman, activist, and leader in the American Civil Rights Movement 1929 - 1968
1950s, Rediscovering Lost Values (1954)
Contexto: Now that isn't the only thing that convinces me that we've strayed away from this attitude, this principle. The other thing is that we have adopted a sort of a pragmatic test for right and wrong—whatever works is right. If it works, it's all right. Nothing is wrong but that which does not work. If you don't get caught, it's right. [laughter] That's the attitude, isn't it? It's all right to disobey the Ten Commandments, but just don't disobey the eleventh, "Thou shall not get caught." [laughter] That's the attitude. That's the prevailing attitude in our culture. No matter what you do, just do it with a bit of finesse. You know, a sort of attitude of the survival of the slickest. Not the Darwinian survival of the fittest, but the survival of the slickest—whoever can be the slickest is the one who right. It's all right to lie, but lie with dignity. [laughter] It's all right to steal and to rob and extort, but do it with a bit of finesse. It's even all right to hate, but just dress your hate up in the garments of love and make it appear that you are loving when you are actually hating. Just get by! That's the thing that's right according to this new ethic. My friends, that attitude is destroying the soul of our culture. It's destroying our nation.

— Ralph Waldo Emerson American philosopher, essayist, and poet 1803 - 1882
Variante: To accomplish excellence or anything outstanding, you must listen to that whisper which is heard by you alone.

— Tim Cook American business executive 1960
Bloomberg: Apple's Cook to Meet With Trump Amid China Trade Tensions https://www.bloomberg.com/news/articles/2018-04-25/apple-s-cook-to-meet-with-trump-amid-u-s-china-trade-tensions (25 April 2018)

— Robert H. Jackson American judge 1892 - 1954
319 U.S. 641-42
Judicial opinions, West Virginia State Board of Education v. Barnette (1943)
Contexto: The case is made difficult not because the principles of its decision are obscure but because the flag involved is our own. Nevertheless, we apply the limitations of the Constitution with no fear that freedom to be intellectually and spiritually diverse or even contrary will disintegrate the social organization. To believe that patriotism will not flourish if patriotic ceremonies are voluntary and spontaneous instead of a compulsory routine is to make an unflattering estimate of the appeal of our institutions to free minds. We can have intellectual individualism and the rich cultural diversities that we owe to exceptional minds only at the price of occasional eccentricity and abnormal attitudes. When they are so harmless to others or to the State as those we deal with here, the price is not too great. But freedom to differ is not limited to things that do not matter much. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order.

— Bel Kaufmanová, libro Up the Down Staircase
Part III, ch. 18 (Bea Schacter)
Up the Down Staircase (1965)
„If not excellence, what? If not excellence now, when?“
— Tom Peters American writer on business management practices 1942
Fuente: The Little Big Things: 163 Ways To Pursue Excellence (2010), p. 9.

„Have to sow excellent seeds to have an excellent life. Must start with sowing excellent thoughts.“
— John C. Maxwell American author, speaker and pastor 1947

— Vernon L. Smith American economist 1927
Milgrom and Roberts, 1987, p. 185
Fuente: "Theory, experiment and economics," 1989, p. 151.

— Frederick William Robertson British writer and theologian 1816 - 1853
Fuente: Dictionary of Burning Words of Brilliant Writers (1895), P. 517.