Jane Roberts channeled the Seth books. She also psychically tuned into the world view of Paul Cezanne (besides Rembrandt, and William James).
I was reading the Cezanne book and came across this incredible passage:
"Generally speaking, most people express themselves through the world as it is: they let their existence flow through the available conventions, social and professional groupings, government or religious organizations -- and through these means they express themselves. To some extent, they disperse themselves so automatically into these ready-made cultural forms that their own inner feelings are never directly encountered. The artist is always making a new world that is his body of work. He is always encountering himself because he is not dispersing himself as others do. His stability, such as it is, is his work. It is not sanctioned by convention.
By taking himself out of that context, however, he is more aware of his sensations and reactions than others who have more or less automatic pockets in which to place them: love goes to the family or the church; hatred to the despoilers of church, property, life, or state; envy against the rich, and so forth. The artist has no place to put his emotions in those terms, and sometimes his own feelings astonish him. His emotional experience is more vivid in many ways -- for this reason; that he does not disperse it. With its energy he forms his world of pictures.
For all this, the artist's goals are often unknown to him except as they unfold. In this fashion, he goes on faith more than other men. His medium is not primarily one of words at all, so often even his thoughts are shaped and formed, without what is considered reason's substance. Not that his thoughts may not be reasonable, but that his intuitions and purposes are shapes to him rather than words; a vocabulary of pigment, light and shadow rather than letters. For his vision is concerned with inner substance, in a different way than say, a writer's is." (page 61-26, The World View of Paul Cezanne, Jane Roberts.)