In 1885 Kristine and her family began spending summers at Bailey Island (Maine), a location that was reminiscent of her mother's native Denmark.
From there she returned to Orange where she helped her father as editor of the New Church Messenger, the official organ of the Swedenborgian General Convention.
Mann was a follower of Henry James Sr., whose anti-ecclesiastical approach had brought him into conflict with the New Church in Chicago, resulting in the family moving to Orange.
She taught in the Physical Education Training School of Wellesley College, having charge of corrective exercises and freshman hygiene.
In 1911 Mann had returned to New York to begin a two-year investigation of health conditions of saleswomen for the New York Department Store Education Association, and after the beginning of World War I joined the United States Army Ordnance Department supervising the health of women in munition plants.
In 1920 Bertine traveled to London, England, to begin analysis with Constance Long, the first British psychoanalyst to follow Jung's methods.
A small determined band of Jungians emerged in New York, and in 1924 Mary Esther Harding, a distinguished disciple of Jung, emigrated from England to join them.
Beginning around 1918 Jung wrote that Christianity had suppressed the animal element in the human psyche, and as a result when it broke out it was uncontrolled and unregulated.