Three Sharira (Taittiriya Upanishad) - Video

Q: How our Body exists in the Universe?

Ans: Mentioned in Mandukya Upanishad (Atharva Veda) and Taittiriya Upanishad (Yajur Veda):-

1. Material Realm (Bhur Loka): Sthula Sharira (Physical Body)
a) Annamaya Kosha (Body which requires food and water)
b) Pranamaya Kosha (Body which requires air)

2. Astral Realm (Bhuvah Loka): Sookshma Sharira (Astral Body)
a) Manomaya Kosha (Emotional body)
b) Vijnanamaya Kosha (Intellectual Body)

3. Causal Realm (Svah Loka): Karana Sharira (Causal Body)
Anandamaya Kosha (Blissful Body)

4. Brahman (Vibrationless World): Turiya State of Consciousness
Atman (Pure Consciousness)

Q: How Atma (Consciousness) transmigrates?

Basics:-
Atma -- Pure Consciousness
Consciousness -- Intelligent type of Energy
Energy -- Both Living and Non Living
Energy -- Bunch of Vibrations
Vibrations -- Duality stemming from Desire
Time -- An outcome of Desire

Ans: As per Taittiriya Upanishad, evolution takes place in the following ways:-

Amoeba (Annamaya Kosha)
Plants (Annamaya Kosha)
Insects (Annamaya Kosha, Pranamaya Kosha)
Vertebrates (Annamaya Kosha, Pranamaya Kosha, Manomaya Kosha)
Reptiles (Annamaya Kosha, Pranamaya Kosha, Manomaya Kosha)
Mammals (Annamaya Kosha, Pranamaya Kosha, Manomaya Kosha, Vijnanamaya Kosha)
Humans (Annamaya Kosha, Pranamaya Kosha, Manomaya Kosha, Vijnanamaya Kosha, Anandamaya Kosha)
Astral Being (Manomaya Kosha, Vijnanamaya Kosha, Anandamaya Kosha)
Causal Being (Anandamaya Kosha)
After being born in the Astral and Causal Realm, our Anandamaya Kosha expands and finally sets the Atman free.