Abstract

Man is endowed with brain and mind for comprehending reality of the world. Brain is material entity and is observable, while mind is a non-physical conceived entity. Scientific investigations enhance our knowledge of the functioning of brain and its constituents. They indicate mind-brain association but do not rule out the possibility, in which mind is a property of brain. The perceived reality of the world has both objective and subjective components. The objective components are attributed to brain either alone or in association with mind. The subjective components are considered to be the creations of mind but they appear to contain grains of reality. Attempts made to separate these grains have succeeded partially. One hopes for complete success only after the incorporation of a few missing ingredients. It is our contention that the missing ingredients are human being as an entangled quantum entity - photon field, quantum entity's capability to read information from photon fields of other humans and from its own field reflected by the environment. The evidence for the first ingredient is provided by the analysis of spontaneously emitted visible range photon signals by human beings. The other two ingredients put usual charge- photon interaction in proper context. The experimental results relevant to mind- brain interface are briefly described. A few minutes' time series of small portion of these signals determines their nine properties, which establish quantum nature of signal, and specify quantum state of the dominant component to be squeezed state. Six properties differ in signals emitted at 12 anatomical sites of the same person. Profile of a property for a person is the set of its values at 12 sites. Profile is very informative and can discriminate persons with differing holistic features. Cluster analysis offers procedures for measuring qualitative holistic features e.g. procedure for measuring ‘meditativeness' of a person. The incorporation of other two ingredients chalks out a route for answering the question who we are?