The article attempts to set up a dialogue between Tommaso Greco's analysis of the relationship between law and ethics starting from the experience of trust and the perspective provided by phenomenological philosophy. The paper identifies three dimensions, one epistemic-epistemological, one ontological, and one ethical-normative as the philosophical backgrounds of Greco’s discourse. It is thus clarified how the rethinking of the relationship between law and ethics is further based on a revision of the fundamental concepts of reality and subjectivity.