Livets Bog, vol. 2
The basic solution to the mystery of life No. 5 - The existence of the living being.
563. As this fundamental solution is so incontestable, the investigator must of necessity acknowledge the presence of a "thinker" or "creator of ideas", for "the creation of ideas" or "thought" can only exist as a characteristic of a "living being". This "living being" is the basic solution No. 5 to the mystery of life.