Quotation:

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

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

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

 Leo Nikolaevich Tolstoy quotes (Russian moral Thinker, Novelist and Philosopher, notable for his influence on Russian literature and politics. 1828-1910)

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

 Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)

 Sergei Rachmaninov quotes

 Henry Wadsworth Longfellow quotes (the most popular American Poet in the 19th century, 1807-1882)