Praxis is the process by which a theory, lesson, or skill is enacted, embodied, or realised. "Praxis" may also refer to the act of engaging, applying, exercising, realizing, or practicing ideas. This has been a recurrent topic in the field of philosophy, discussed in the writings of Plato, Aristotle, St. Augustine, Immanuel Kant, Søren Kierkegaard, Karl Marx, Martin Heidegger, Hannah Arendt, Paulo Freire, Ludwig von Mises, and many others. It has meaning in the political, educational, and spiritual realms.