Quotation:

 Joseph Joubert quotes (French Essayist and moralist, 1754-1824)

 Robert M. Hutchins quotes (American Educator and Writer, active in forming the Committee to Frame a World Constitution (1945), led the Commission on Freedom of the Press (1946), and vigorously defended academic freedom, opposing faculty loyalty oaths in the 1950s. 1899-1977)

 Ralph Waldo Emerson quotes (American Poet, Lecturer and Essayist, 1803-1882)

 Chinese Proverbs quotes

 Bertrand Russell quotes (English Logician and Philosopher 1872-1970)

 Anatole France quotes (French Writer, member of the French Academy and Nobel Prize for Literature in 1921, 1844-1924)

 Robert Frost quotes (American poet, 1874-1963)

 Ignacio Estrada quotes

 Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)

 Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)

 Carl Rogers quotes