The series of 5 talks from this retreat explore a central feature of Dharma practice and teachings: How we get uptight and reactive (Upadana / Clinging) around our experience, and the transformational possibility of letting go. The talks cover the Buddhas teachings on the 3 main realms of experience that we cling most tightly to, as well as exploring and pointing towards the nature of the heart that is free from clinging. Starting with the existential, progressing towards the personal, this fourth talk explores the Buddhas teachings on the third realm of clinging - to existence and non-existence. Martin explores what we identify with - as well as what we dont, and our limited capacity to only conceive in terms of is or isnt, exists or doesnt, while pointing to a way of meeting life that isnt constrained by this reductive dichotomy.