One important IDEA out of the “IDEA continuum” is the “separated existence”. The word ENTITY is representing this IDEA.
An entity in its simplest form has no other attribute than it does exist.
In FINAL THEORY, all entities in the universe have a mind, a goal, a will and freedom to act. But they are restricted to a subset of the IDEA-continuum.
The simple entities have no body.
Photons, neutrinos, higgs boson and all punctiform quanta in physics are such spiritual entities building matter.