There is a simple, obvious truth: there is no such entity as “me”. That is the main insight in all paths of liberation. There is no separate, solid entity called "me" or "self" anywhere to be found. The sense that there is something like that is the root cause for all suffering.  
Because of this mistake you feel you live in a prison, spending your life  protecting and trying to make happy something that was never there to begin with. Seeing through this illusion is simple and straightforward.

2. Beyond Mindfulness - Exploring Selflessness

Stephan Wormland, MA in clinical psychology and trained in Gestalt therapy. He has studied and practiced meditation in multiple Buddhist traditions for over 30 years and spent altogether 5 years in meditation retreats. Stephan was a monk in the Tibetan tradition for 11 years and teaches meditation in Buddhist centers in Europe.

2. Beyond Mindfulness - Exploring Selflessness

Natural Meditation podcast