Interior research is fundamentally different than the research
conducted in the external world. In the external world, the
researcher finds subjects for his experiments, but in interior
research, the researcher must become the subject himself.
The task is enormously difficult, for the interior researcher must
assume the attitude, "I am a researcher, I am a laboratory, and I
am the subject."...
A true researcher uses all means available to search for the cause of
the happenings in the internal world.
Path of Fire and Light