While on a long-term retreat 2008-9, I experienced a profound connection between mystical explorations of the unity of being and the fundamentals of the person-centred approach (PCA). Both traditions call for a particular quality of attention to be paid to whatever is happening in relationship, with Other people and with Being itself. The territory discussed in my chapter was part of the exploration I undertook into the meaning of this experience while a student at the University of Edinburgh.