Source: The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness
“And a third danger is timidity. Few men are willing to brave the disapproval of their fellows, the censure of their colleagues, the wrath of their society. Moral courage is a rarer commodity than bravery in battle or great intelligence. Yet it is the one essential, vital quality of those who seek to change a world which yields most painfully to change.”
Day of Affirmation Address (1966)
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Robert F. Kennedy 72
American politician and brother of John F. Kennedy 1925–1968Related quotes

Day of Affirmation Address (1966)
Context: The help and the leadership of South Africa or of the United States cannot be accepted if we, within our own country or in our relationships with others, deny individual integrity, human dignity, and the common humanity of man. If we would lead outside our borders, if we would help those who need our assistance, if we would meet our responsibilities to mankind, we must first, all of us, demolish the borders which history has erected between men within our own nations — barriers of race and religion, social class and ignorance.
Our answer is the world's hope; it is to rely on youth. The cruelties and the obstacles of this swiftly changing planet will not yield to obsolete dogmas and outworn slogans. It cannot be moved by those who cling to a present which is already dying, who prefer the illusion of security to the excitement and danger which comes with even the most peaceful progress. This world demands the qualities of youth: not a time of life but a state of mind, a temper of the will, a quality of the imagination, a predominance of courage over timidity, of the appetite for adventure over the love of ease.

“It is not great men who change the world, but weak men in the hands of a great God.”
Source: The Heavenly Man: The Remarkable True Story of Chinese Christian Brother Yun

as quoted in American Journal of Physics, 44(2), p176, 1976-02
unsorted
Science and Human Values (1956, 1965)
Introduction
The Portable Matthew Arnold (Viking Press, 1949)

Salon interview (2001)

“The women who changed the world never needed to show anything other than their own intelligence.”
Source: Cited in Addio a Rita Levi Montalcini, scienziata e donna straordinaria http://www.panorama.it/scienza/rita-levi-montalcini-morta/, Panorama.it, 30 dicembre 2012.

“Patience, that blending of moral courage with physical timidity.”
Phase the Fifth: The Woman Pays, ch. XLIII
Tess of the d'Urbervilles (1891)