[the experience of the knowledge in Newton's and Goethe's works]

The origin of the knowledge, explained through the perception of the colours saw, during many years, the contrast between the two theories asserted by the objectivists and subjectivists. the authors have emblematically brought the two schools back to two excellent personages: Newton (1704) and Goethe (1810), the former physicist, the latter naturalist. Newton was an upholder of the corpuscolar theory of the light and of the objective process. Goethe, on the contrary, tried to assert the ondulatory theory of the light. Authors' work centers on the exegesis of the significant passages of the two personages' fundamental works together with the reflections of the philosophers of the science, who were contemporary with Newton and Goethe and posteriors to them.