“When combined, the small individual contributors of caring, friendship, forgiveness, and love, each of us different from our next-door neighbors, can form a phalanx, an army, with great capability.”

Source: The Ordeal of Change (1963), Ch. 11: "Brotherhood"
Context: It is easier to love humanity as a whole than to love one's neighbor. There may even be a certain antagonism between love of humanity and love of neighbor; a low capacity for getting along with those near us often goes hand in hand with a high receptivity to the idea of the brotherhood of men. About a hundred years ago a Russian landowner by the name of Petrashevsky recorded a remarkable conclusion: "Finding nothing worthy of my attachment either among women or among men, I have vowed myself to the service of mankind." He became a follower of Fourier, and installed a phalanstery on his estate. The end of the experiment was sad, but what one might perhaps have expected: the peasants — Petrashevsky's neighbors-burned the phalanstery.
Some of the worst tyrannies of our day genuinely are "vowed" to the service of mankind, yet can function only by pitting neighbor against neighbor. The all-seeing eye of a totalitarian regime is usually the watchful eye of the next-door neighbor. In a Communist state love of neighbor may be classed as counter-revolutionary.

Original: (it) In amore e in amicizia piccole attenzioni regalano grandi emozioni.
Source: prevale.net

Source: An Essay on Friendship, 1732, pp. 54-55

ABC News interview http://abcnews.go.com/Politics/Vote2008/story?id=5782924&page=2,
2014

Source: Quaestiones disputatae: De caritate (ca. 1270) http://dhspriory.org/thomas/QDdeVirtutibus2.htm#4

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Fruits of Solitude (1682), Part I