getting rid of the known is freedom. habits embedded into beings are not trown out by imagination. we are slaves of our body sensations. if you meditate by making the alamban of your body sensations . the observation of their impermanence. impermanent nature of all sensations on body. the contineous changing nature. is really breakng the walls of your prison.
reactions to these body sensations is the bondage. get rid by just observation. do nothing. not to do any thing is the most difficult thing inthe world. just observe the body sensations, deeper and deeper. and dont react