Starting from the examination of the gnoseological method suggested by John Locke in his Essay concerning Human Understanding and from the study of the psychich contents such as pleasure/delight and pain/uneasiness and their place in the taxonomy of the ideas, I hereby aim to re-consider the Lockean conception of consciousness and self-consciousness, trying to bring some unprecedented aspects to light, aspects which seem to leave an opening for a genuine critical ontology of the human person. These outcomes, although distancing themselves from the traditional historico-philosophical interpretation of the Lockean thought (which focused on Hume and underlined the genealogical relationship between Locke and the Scottish empiricist), are in ful...