Mauss also focused on the topic of sacrifice. The book "Sacrifice and its Function" which he wrote with Henri Hubert in 1899 argued that sacrifice is a process involving sacrilising and desacralising. This was when the "former directed the holy towards the person or object, and the latter away from a person or object." Mauss and Hubert proposed that the body is better understood not as a natural given. Instead, it should be seen as the product of specific training in attributes, deportments, and habits. Furthermore, the body techniques are biological, sociological, and psychological and in doing an analysis of the body, one must apprehend these elements simultaneously. They defined the person as a category of thought, the articulation of particular embodiment of law and morality. Mauss and Hubert believed that a person was constituted by personages (a set of roles) which were executed through the behaviors and exercise of specific body techniques and attributes.