Three types of Human Body - An Introduction

The purpose of life is the realisation of one’s own essential nature. It is to know that you are the pure ever-free Atman. The Vedanta expounds the great truth that Atman alone is real, the phenomenal world is unreal. You are Atman, but you forget your real Svarupa due to identification with the body. This is called Deha-Adhyasa. This is the greatest obstacle to Self-Knowledge or Atma-Jnana. To get over this delusion of identification with body the Vedantic Seers have made a detailed analysis of the different bodies, gross and subtle, and systematically proved that the Jiva is not the body but is identical with the Paramatman. The study of the three bodies, the five sheaths and the three states of waking, dream and deep sleep, helps man to understand that he is different from all these diverse modifications and that he is the unchanging, constant, witness of all these. This helps him to feel that he transcends the three states, the three bodies and the Panchakoshas.

Constant remembrance of this and meditation on this knowledge will lead him to the realisation of his Atma-svarupa. Therefore, the study of the Panchakoshas is a valuable aid in the process of disassociating yourself from the bodies and the sheaths. It enables you to rise above body-consciousness, to feel that you are the Atman and thus remain quite unaffected and unattached amidst all distractions and tribulations of life.

The individual experiencer (the true Self or Atman) is a consciousness-centre enveloped by several layers of matter existing as the factors causing objective awareness in it. The analysis of these layers or bodies is necessary to ascertain the nature of the true Self. 

The three types of Bodies:

Disciple: How many bodies are there in an individual (Jiva)?
Guru: There are three bodies in every individual (Jiva).
Disciple: Please name them.
Guru: The physical body or the gross body (Sthula Sarira), the astral body or the subtle body (Sukshma Sarira or Lingadeha) and the causal body or the seed body (Karanasarira) are the three bodies.
Disciple: Please illustrate them.
Guru: The shell of a tamarind corresponds to the physical body. The pulp represents the subtle body. The seed corresponds to the causal body. Ice represents the physical body. H2O represents the subtle body. The Tanmatras or root-elements correspond to the causal body.

- Guruji Swami Sivananda