Edmund Husserl and Edith Stein seem to share the same starting point: the pure I. Though Stein’s epistemology is based on this concept, her eidetic phenomenology will include the quality of the personal I. This fundamental decision has a striking influence on her vision of the object: it is more than its mere representation in the consciousness; it has an ontic quality and touches the ontic me, the concrete person. The quality of the subject is crucial for how it is entangled in the concrete reality. Stein explores this, for example, in her work “Psychic Causality”. Existential questions gradually become more visible in her research. Nevertheless, she sticks to Husserl’s epistemology: the concept of the subject must be as clear as the object, and the notions must be clarified in order to understand the essence of what will be subjected to further research. Eidetic phenomenology will, according to Edith Stein, be the foundation of all further empirical and qualitative research.