Step 1: Understanding the Concept:
In Taittiriya Upanishad, the human existence is described through five sheaths (Pancha Kosha) that cover the Atman (Self). Step 2: Detailed Explanation:
The sheaths are arranged from the grossest (physical) to the subtlest (spiritual) layers:
1. Annamaya Kosha: The food-apparent sheath (Physical body). This is the outermost layer.
2. Pranamaya Kosha: The air/energy-apparent sheath (Vital life force).
3. Manomaya Kosha: The mind-apparent sheath (Mental and emotional layer).
4. Vijnanamaya Kosha: The wisdom-apparent sheath (Intellect and discernment).
5. Anandamaya Kosha: The bliss-apparent sheath (The innermost core). Step 3: Final Answer:
The Annamaya Kosha is the outermost sheath as it represents the physical body made of food.