It is a relief, and a palate cleanser, to watch a documentary concerned with quietness, stillness and contemplation. Yet however slowly paced, a film’s grammar and rhythm will perhaps never truly approach the structure of solitude and contemplation that is the point here. Walk With Me is a study of the 91-year-old Vietnamese zen Buddhist monk Thich Nhat Hanh, and his retreat in Plum Village in south-west France. His teachings are credited with the phenomenal success of mindfulness and the spiritual concentration on the present moment.