The final book in the three-volume series, A Clinical Application of Bion's Concepts - a practical companion to the dictionary of concepts The Language of Bion - is divided in four main parts. Part I, through the aid of a transdisciplinary study between psycho-analysis, mathematics, and physics, proposes four expanded variations of Bion's epistemological tool, The Grid. This was construed around an Euclidean space represented graphically by two dimensions constantly conjoined: the dimension of Functions of the Ego with the dimension of Psycho-genetics of thought processes. Bion's tool, by its own design, allows possibilities of development with regards to its ability to scrutinize the 'truth-value' of statements issued both by patients and analysts in the space-time, or the 'here and now' of psycho-analytic sessions or groups of sessions. The proposal is made though three steps; each one adds a subsequent dimension to the earlier one considered.