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- Every work of art must retain something from the first days of creation, something of the smell of earth, or one could even say: something animate.
- As quoted in The Art of Wilhelm Lehmbruck (1972) by Reinhold Heller
- Sculpture is the essence of things, the essence of nature, that which is perpetually human.
- As quoted in Expressionism (2004) by Norbert Wolf and Uta Grosenick, p. 64