“When I was young I once found a book in a Dutch translation, 'The leaves of Grass'. It was the first time a book touched me by its feeling of freedom and open spaces, the way the poet spoke of the ocean by describing a drop of water in his hand. Walt Whitman was offering the world an open hand (now we call it democracy) and my 'Monument for Walt Whitman' became this open hand with mirrors, so you can see inside yourself.”
Source : "Karel Appel - the complete sculptures". Book edited by Harry de Visser and Roland Hagenberg, Edition Lafayette, New York, p. 93, 'Quotes', 1990.