There is fire in wood, but it is never seen by cutting upon a piece of wood. Similarly, the Soul lives within the body, but it can never be seen by cutting the body.
अग्निर्दारुगतो यद्वद् भिन्ने दारौ न दृश्यते। तथैवात्मा शरीरस्थो योगेनैवानुदृश्यते॥