The essence of a quote is the compression of a mass of thought and observation into a single saying.
Source: In The Ultimate Success Quotations Library, 1997.
-- John Morley, (Dec 24 1838-1923), English journalist, politician, historian; He was a member of parliament, 1880s-1890s and editor of Fortnightly Review, 1867-82; wrote Voltaire, 1872.