  whenever an ontology takes for its theme entities whose character of Being is other than that of Dasein, it has its own foundation and motivation in Dasein's own ontical structure, in which a pre-ontological understanding of Being is comprised as a definite characteristic… Therefore fundamental ontology, from which alone all other ontologies can take their rise, must be sought in the existential analytic of Dasein. (Being and Time 3: 33–4) 