Page "Phenomenology (philosophy)" Paragraph 35

Instead of taking phenomenology as prima philosophia or a foundational discipline, Heidegger took it as a metaphysical ontology: " being is the proper and sole theme of philosophy ... this means that philosophy is not a science of beings but of being .".

Yet to confuse phenomenology and ontology is an obvious error.

Phenomena are not the foundation or Ground of Being.

Neither are they appearances, for, as Heidegger argues in Being and Time, an appearance is " that which shows itself in something else ," while a phenomenon is " that which shows itself in itself.