"Remarks to Student Participants in the White House Seminar in Government (334)" (27 August 1963) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx
1963
“I hope that all of you who are students here will recognize the great opportunity that lies before you in this decade, and in the decades to come, to be of service to our country. The Greeks once defined happiness as full use of your powers along lines of excellence, and I can assure you that there is no area of life where you will have an opportunity to use whatever powers you have, and to use them along more excellent lines, bringing ultimately, I think, happiness to you and those whom you serve.”
"Address at the University of Wyoming (381)" (25 September 1963) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx
1963
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John F. Kennedy 469
35th president of the United States of America 1917–1963Related quotes
“Happiness comes from the full use of one's power to achieve excellence.”
Thoughts on Man's Purpose in Life (1974)
Context: Happiness comes from the full use of one's power to achieve excellence. Life is potentially an empty hole, and there are few more satisfying ways of filling it than achieving and exercising excellence.
This principle of excellence is on which Americans seem to be losing, and at a time when the Nation stands in need of it. A lack of excellence implies mediocrity. And in a society that is willing to accept a standard of mediocrity, the opportunities for personal failure are boundless. Mediocrity can destroy us as surely as perils far more famous.
It is important that we distinguish between what it means to fail at a task and what it means to be mediocre. There is all the difference in the world between the life lived with dignity and style which ends in failure, and one which achieves power and glory, yet is dull, unoriginal, unreflective, and mediocre. In a real sense, what matters is not so much whether we make a lot of money or hold a prestigious job; what matter is that we seek out others with knowledge and enthusiasm — that we become people who can enjoy our own company.
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 152.
Ringo Rama promotional interview with Jody Denberg (July 2003) http://abbeyrd.best.vwh.net/jodyringorama.html
2012, Yangon University Speech (November 2012)
Personality Lectures
Life of Alexander
Bartlett's Familiar Quotations, 10th ed. (1919)
Quoted by Plutarch in Life of Alexander http://books.google.com/books?id=vWIOAAAAYAAJ&q=%22for+my+part+I+assure+you+I+had+rather+excel+others+in+the+knowledge+of+what+is+excellent+than+in+the+extent+of+my+power+and+dominion%22&pg=PA167#v=onepage from Plutarch's Lives as translated by John Dryden (1683)