“One can experience the distinction between the subtle and gross bodies even daily; in a dream, one's gross body is lying on the bed while the subtle body carries the soul, the living entity, to another atmosphere. But because the gross body has to be continued, the subtle body comes back and settles in the present gross body. Therefore one has to become free from the subtle body also. This freedom is known as mukta-linga.” (Shrila Prabhupada, Shrimad Bhagavatam, 4.12.18 Purport)