Mary Henle was an American psychologist who's known most notably for her contributions to Gestalt Psychology and for her involvement in the American Psychological Association. Henle also taught at the New School of Social Research in New York; she was involved in the writing of eight book publications and also helped develop the first psychology laboratory manual in 1948 based on the famous works of Kurt Lewin.
The creative thinker must stand sufficiently detached from his work.
It seems safe to say that significant discovery, really creative thinking, does not occur with regard to problems about which the thinker is lukewarm.
If the individual is narrowly concentrated on the goal, to the exclusion of other relevant aspects of the problem situation, he is often unable to achieve a solution. The creative thinker must stand sufficiently detached from his work.