“[...] it would be far simpler if we could limit ourselves to examining the chemistry and physiology of [the patient's] brain, and to treating mental events as objects alien to our immediate experience, or as mere variables of impersonal statistical formulae. Important as these approaches are for the understanding for human behavior, they cannot alone uncover or explain all the relevant facts. To see into the mind of another, we must repeatedly immerse ourselves in the flood of his associations and feelings; we must be ourselves the instrument that sounds him.”