If a thorn has actually pierced the skin of a person, the pain caused can be removed only by the action of removing the thorn. But if one’s suffering is due to having mistaken a rope for a snake, that suffering can be removed only by the knowledge that there is only a rope and not a snake and not by any action. So also, bondage, which is only due to wrongly considering oneself as the body, mind and organs, can be eradicated only by the realization that one is the Self which is beyond all suffering.
Elucidation of Terms and Concepts in Vedanta [Based on the Commentaries of Sri Sankaracharya and other authoritative texts] By S. N. Sastri www.advaita.org.uk/discourses/s_n_sastri/s_n_sastri.htm