Records show a strange congruence between the development and psyche of these two men:
Blake saw the face of God in his window at four.
Jung dreamed of a giant turd dropping from heaven on the cathedral at four.
Both men had a critical attitude toward conventional Christianity; note Blake's "Nobodaddy" and Jung's departure from several generations of ministers on both sides of his family, and of course the 'turd dream'.
Both men were primarily visionaries and poets although Jung of course carefully disguised himself from those roles.
In particular you will note a strange coincidence regarding one extremely critical vision: Blake's four zoas and Jung's four functions. The functions appear to relate positively to the zoas:
Tharmas may be related to Sensation.
Luvah to Feeling.
Urizen to Thinking.
Los to Intuition.
How did this come about? We know that Jung had read Blake.
Rightly or wrongly he never gave Blake credit for the functions. To do that might have given away his mask as a scientist.
In studying the two men we note a close resemblance between poetic (and graphic) vision and scientific discovery. Blake was certainly not (much of) a scientist, and Jung was more of a visionary than he cared to acknowledge.
He came closest in Memories, Dreams, and Reflections, written in his 80's and published posthumously. By that time he didn't care!