Quotation:

 Oliver Wendell Holmes quotes (American Physician, Poet, Writer, Humorist and Professor at Harvard, 1809-1894)

 Rabindranath Tagore quotes (Indian Poet, Playwright and Essayist, Won the Nobel Prize for Literature in 1913, 1861-1941)

 Oliver Wendell Holmes quotes (American Physician, Poet, Writer, Humorist and Professor at Harvard, 1809-1894)

 Oliver Wendell Holmes quotes (American Physician, Poet, Writer, Humorist and Professor at Harvard, 1809-1894)

 Clarence Darrow quotes (American Lawyer, Speaker and Writer, 1857-1938)

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 Agatha Christie quotes (English Detective, Novelist and Playwright, 1890-1976)

 Charles F. Kettering quotes (American engineer, inventor of the electric starter, 1876-1958)

 Clarence Darrow quotes (American Lawyer, Speaker and Writer, 1857-1938)

 John Gay quotes (English Poet and Dramatist, 1685-1732)

 Oliver Wendell Holmes quotes (American Physician, Poet, Writer, Humorist and Professor at Harvard, 1809-1894)

 Jim Rohn quotes (American Speaker and Author. He is famous for motivational audio programs for Business and Life. )