A thought form is the astral or possibly etheric creation of nonphysical (mental, emotional, magickal, etc.) focus that has been so intense, purposeful, or skilled that the creation has a life beyond the period of focus (thinking, feeling, ritual, etc) and a certain independence of its creator.
The creation could - in terms of its effects - be BPM, neutral, or nonBPM.
For more on this, see:
- https://occult-world.com/thought-form/;
- https://en.wikipedia.org/w/index.php?title=Tulpa&oldid=1059095936.
The creation of nonphysical focus on higher levels (e.g., mental or spiritual) is an idea or an inspiration.