Our sanity depends on maintaining a coherent sense of self, and on setting healthy boundaries between ourselves and others – and neither Alan Watts nor Eckhart Tolle wishes to imperil your sanity. Instead, the conclusion to which both their thinking leads is that the self is best thought of as some kind of a fiction, albeit an extremely useful one – and that realising this, instead of doing everything we can to deny it, might be the route to fulfilment.