First, he believed that the fundamental concepts of science were not too esoteric to be understood by an average person.
Second, he believed that the scientific enterprise, contrary to popular opinion, involves basic human values, that is, that
science is not a neutral activity.
Fourth, science is a creative endeavour involving mental processes similar to those usually attributed to artists.
Finally, in the latter decade of his life, he explored the boundary between humans and the other animals in an attempt to discover the uniqueness of humans. this led to his fifth theme or hypothesis:
the uniqueness of humans lies in their imagination, a faculty brought into play by both scientists and artists.
That the latter theme dovetails amiably with the former ones indicates how, in fact, his natural philosophy was 'all of one piece.'