The article argues that the traditional idea of a priori knowledge and essence should be rethought. By using a Husserlian phenomenological approach, the author suggests that a priori knowledge should be seen as originating from subjective experiences rather than existing independently. This shift challenges the traditional metaphysical understanding of a priori knowledge and essence. The author emphasizes the role of subjective processes, particularly inner temporality, in shaping our understanding of a priori knowledge. Ultimately, the article proposes a new perspective that questions the traditional ontological sense of a priori knowledge.