Our nature is awareness beyond the ego. One's imagination imprisons, for the person identifies with this imagination. The ego is an error, a lack of true vision. Thoughts, feelings appear and leave their imprint, if unchecked. Memories of them constitute a continuity which is non-existent.
Awareness is reflected in the mind's mirror giving birth to ego.
Confused by the reflection, the ignorant one believes himself to be an separate individual. In reality, we are beyond space and time. Don't surround yourself with imagined limitations, and impose a image on yourselves. This condition is the root of ignorance and the cause of all suffering. The vichara most effective is the atmavichara , which is the enquiry into the self.