According to Darth Plagueis' writings, pneuma was the part of the Force that was the expression of conscious thought. It was one of the three aspects of the Force, along with the aperion and the anima.
Behind the scenesEdit
This aspect (or category) of existence that draws on the Force was first mentioned in the Book of Sith: Secrets from the Dark Side, on page 130.
- Book of Sith: Secrets from the Dark Side (First mentioned)