Hilma af Klint's works carry within them a message and a philosophy of life, and according to Erik af Klint (1901-81), who was the sole heir to af Klint's oeuvre, and founder of The Hilma af Klint Foundation, 'Everything should be done to bring this hidden message to light.'

Hilma af Klint left behind 1,600 works of different kinds, 124 of which were notebooks and diaries with a total of 26,000 pages. Now, for the first time, all these diaries and notebooks have now been examined in the quest for the answer to what message, mission and philosophy of life the work contains, and what, as Erik af Klint writes, 'Hilma af Klint's spiritual masters intended with them.' Hilma af Klint called the notebooks 'educational material', and they are the key to understanding her paintings.

Hilma af Klint: Message and Mission, among other things, brings up ideas from Spiritualism, Theosophy and Anthroposophy, and also thoughts from Rosicrucianism, that af Klint called 'mystery knowledge', and which influenced her message, mission and philosophy of life.