The “four feelings” that Pierre Janet identified almost a hundred years ago (effort, joy, sadness, fatigue) and what he called the “regulators of action” already form a given estimate/evaluation of the latter in the sense that they bring something positive (effort, joy) or negative (sadness, fatigue) according to a given goal: evaluation. This then establishes the perception or belief that by doing so we preserve ourselves in the sense of preserving a certain continuity and we also refine ourselves in the idea of renewing ourselves better; which technically (logically) implies using a diversity of approach and a prioritization of principles of action called respectively dispersion and dissolution, the former being more associated with refinement and the latter with conservation. It is what will be called here the four inflections of the regulators of the action that are the four feelings above. These inflections are noticeable both anthropologically (socially-historically) and structurally (universally) in the sense of questioning the meaning of the realization (quantitative logic or utilitarianism) of the action: if a then b if and only if a then b (in order to preserve, refine, diversify, prioritize); and this questioning is called moral and political rationality; through this “bias” the four feelings legitimize their content in the sense that their unfolding is not only logical of type if a then b: it is justified by the filter of a meaning that calls into question certain intimate ends; but it is not a question of considering that it is as much subjective “bias” making the so-called “objective” apprehension, if not impossible, at least relative. Rather, we must consider that a permanent interaction is established between logic and rationality, and thus objective morphologically, i.e. universally this interface specific to any action.