of particular facts, and this is derived from experience, which a young man does not possess; for experience is the fruit of years. Phronesis is concerned with particulars, because it is concerned with how to act in particular situations. One can learn the principles of action, but applying them in the real world, in situations one could not have foreseen, requires experience of the world. For example, if one knows that one should be honest, one might act in certain situations in ways that cause pain and offense; knowing how to apply honesty in balance with other considerations and in specific contexts requires experience. Aristotle holds that having phronesis is both necessary and sufficient for being virtuous; because phronesis is practical, it is impossible to be both phronetic and akratic; i.e., prudent persons cannot act against their "better judgement". Modern philosophy Heidegger In light of his fundamental ontology, Martin Heidegger interprets Aristotle in such a way that phronesis (and practical philosophy as such) is the original form of knowledge and thus prior to sophia (and theoretical philosophy). Heidegger interprets the Nicomachean Ethics as an ontology of Human Existence. The practical philosophy of Aristotle is a guiding thread in his Analysis of Existence according to which "facticity" names our unique mode of being-in-the-world. Through his "existential analytic", Heidegger recognises that "Aristotelian phenomenology" suggests three fundamental movements of life including póiesis, práxis, theoría, and that these have three corresponding dispositions: téchne, phrónesis and sophía. Heidegger considers these as modalities of Being inherent in the structure of Dasein as being-in-the-world that is situated within the context of concern and care. According to Heidegger phronesis in Aristotle's work discloses the right and proper way to Dasein. Heidegger sees phronesis as a mode of comportment in and toward the world, a way of orienting oneself and thus of caring-seeing-knowing and enabling a particular way of being concerned. While techne is a way of being concerned with things and principles of production and theoria a way of being concerned with eternal principles, phronesis is a way of being concerned with one's life (qua action) and with the lives of others and all particular circumstances as purview of praxis. Phronesis is a disposition or habit, which reveals the being of the action while deliberation is the mode of bringing about the disclosive appropriation of that action. In other words, deliberation is the way in which the phronetic