Quotation:

 Baruch Spinoza quotes (Dutch Philosopher, exponent of the Rationalism, 1632-1677)

 Ludwig van Beethoven quotes (German Composer the predominant musical figure in the transitional period between the Classical and Romantic era. 1770-1827)

 Friedrich Nietzsche quotes (German classical Scholar, Philosopher and Critic of culture, 1844-1900.)

 Jules Combarieu quotes

 Johann Sebastian Bach quotes (German Composer and Musician. 1685-1750)

 Abraham Maslow quotes (American Philosopher and Psychologist, 1908-1970)

 Henry David Thoreau quotes (American Essayist, Poet and Philosopher, 1817-1862)

 Leonard Bernstein quotes (American Conductor, Composer and Pianist. 1918-1990)

 Ludwig van Beethoven quotes (German Composer the predominant musical figure in the transitional period between the Classical and Romantic era. 1770-1827)

 Pietro Mascagni quotes (Italian operatic Composer. 1863-1945)

 Wolfgang Amadeus Mozart quotes (Austrian Composer, widely recognized as one of the greatest composers in the history of music. 1756-1791)