The teaching uses several connected terms for the human being, but they are not interchangeable. The material body is related to its Etheric Double. The Present-day Personality is the current expression of self-awareness in an incarnation, while the Permanent Personality describes continuity across experience. The teaching also distinguishes Material, Psychical and Noetical Permanent Atoms.
Individuality (Soul) and Spirit-Ego-Self will be introduced gradually in their proper relationship to these foundational terms.