What do we call love, hate, charity, revenge, humanity, forgiveness? Different results of the master impulse, the necessity of securing one's self-approval.
Source: In The Ultimate Success Quotations Library, 1997.
-- Mark Twain, (Nov 30 1835-1910), US novelist, journalist, river pilot; The Great American humorist was also known as The People's Author and creator of Tom Sawyer and Huck Finn.