http://libertytree.ca/quotes/Isaiah.Berlin.Quote.B14E
"Injustice, poverty, slavery, ignorance -- these may be cured by reform or revolution. But men do not live only by fighting evils. They live by positive goals, individual and collective, a vast variety of them, seldom predictable, at times incompatible."
-- Isaiah Berlin
(1909-1997) Russian-British social and political theorist, philosopher, historian
Source: 1909, Four Essays on Liberty, Political Ideas in the Twentieth Century