1. Berger, J., (1972), Ways of Seeing, Penguin Press, London, England (p. 8).
2. Cage, J., (1980), Goethe on Art, University of California Press, Berkeley and Los Angeles, California, USA (p. 6).
3. Madoff, S., H., (2009), Art School (Propositions for the 21st Century), Massachusetts Institute of Technology Press, Canada (p. ix).
4. Hippocrates, (2012) Art is long and life is short The Latin proverb ars longa, vita brevis derives from a saying of the Greek physician Hippocrates.
5. Schaefer-Simmern, H. and Dewey, J., (1948), The Unfolding of Artistic Activity, Its Basis, Processes, and Implications, University of California Press, Berkeley and Los Angeles, California, USA (pp. xiv (after preface), 2, 8).