Sanity is certain chord at trial, made from essential memories and practical arrangements for existence, and which can be defined as the variable capacity actually having subjects and different versions of the world and themselves in which living men. Such versions, -constituidas for diverse cultural traditions and, within it, by the multiple conceptions of what actually have the morphology of the network capabilities and habits of reality, an expression of Tocqueville deserve to be called because they form the plot and density of human intimacy. Paternity and filiation, destiny, freedom and vocation, grief, memory and death, modesty, erotic and sexual relations, hospitality and care, celebrations and dances, guilt, resentment and forgiveness, admiration and finally, hope, are some of the habits of the heart that are studied to the extent that let us live-and simultaneously Configure- the world and our human condition. But such habits are also part of the assumptions that enable knowledge of the real. To think that our cognitive position before the world and to ourselves is indifferent to our vital understanding of parent-child or sex relationships, death, scope or hope of forgiveness is simply negligent lack of thought and experience of self and of others we call "humanity". Both the alleged sufficiency of free reason, as its disavowal of concealment of assumptions, circumventing the crucial: that what we take for real is rather a mode of human presence in the world enabled from the privacy and habits, of which depend on our capacity greater or lesser reality. The study of any such habits of the heart, exposed by major topics of Western culture, we can no longer repair sanity understood as the capacity of reality, but the ineptitude of pure reason and its review by the suspicion for address the comprehensive exploration of vast areas of human experience.