From early on in his life, Jung recognised two distinct personalities within himself.
No 1 was involved in the every day ordinary world, was rational and ambitious, studied science and wanted civilised prestigious life.
No 2 connected with the experience at the age of three, sitting on a granite stone and feeling something eternal in the stone, that was also in him. This side held meaning and connection.
Jung struggled most of his life with the conflict between these two personalities. He became attracted to psychiatry while studying medicine when he read in a book by Kraffe Ebbing that psychiatry is subjective and the psychiatrist responds with his own personality. He felt his two personalities could connect in psychiatry.
"Here at last was a place where the collision of nature and spirit became a reality"
C G Jung