Aesthetic phenomenology, based on the question -«What does to feel mean?» -and with complete comprehension of the rhythms created by the presence of empty spaces between the forms in painting or pauses in music, can widen the scope of psychotherapeutic listening towards the empty spaces present in psychic life during a session. The empty space, the blank space, the unclear, the non-association, is the absence of form. It is both mediator and separator. Through concentrating on what is localized in this manner, in dreams and in words, and which has no precise form in image or word, uniformity makes sense. When open, nothingness becomes the axis of sonority and mutation, the living space, in the most human heart of what is human.