“Only he who has measured the dominion of force, and knows how not to respect it, is capable of love and justice.”

Original: (it) Chi sa donare vero amore appartiene esclusivamente a quella rarità di esseri viventi, capaci di cambiare il mondo.
Source: prevale.net

Source: The Prince of Tides

Source: "Quotes", The Educated Imagination (1963), Talk 6: The Vocation of Eloquence
Context: Freedom has nothing to do with lack of training; it can only be the product of training. You're not free to move unless you've learned to walk, and not free to play the piano unless you practise. Nobody is capable of free speech unless he knows how to use the language, and such knowledge is not a gift: it has to be learned and worked at.

trans. Michael Chase (1995), p. 91
La Philosophie comme manière de vivre (2001)
Context: Only he who is capable of a genuine encounter with the other is capable of an authentic encounter with himself, and the converse is equally true…From this perspective, every spiritual exercise is a dialogue, insofar as it is an exercise of authentic presence, to oneself and to others.

For example, those who want a high quality of work life but don't know how to measure it, often settle for wanting a high standard of living because they can measure it.
Source: 2000s, A little book of f-laws: 13 common sins of management, 2006, p. 4, bold text cited in: Colin J. Neill, Phillip A. Laplante, Joanna F. DeFranco (2011) Antipatterns: Managing Software Organizations and People.

Napoleon : In His Own Words (1916)

Speaking at the second annual graduate fortnight of the New York Academy of Medicine, 15 October 1929. [Lays Nervous Ills to Use of Tobacco: Dr. B.B. Crohn Says Excessive Smoking Is More Serious Problem Than Drinking: Warns Against Cigarette: Medical Fortnight Speaker Lists Excitable States, Hyperacidity and Ulcers as Effects, The New York Times, 16 October 1929, http://search.proquest.com.dclibrary.idm.oclc.org/docview/104691648/87889E05D1964D8EPQ/1?accountid=46320]