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This article is of both a historical and philosophical nature. It aims to present the intellectual relationship between the Spanish philosopher José Ortega y Gasset and one of the most influential German thinkers of the first half of the twentieth century, Nicolai Hartmann. It is based on hitherto unknown and unpublished correspondence that the philosophers conducted intermittently between 1907 and 1912. The correspondence was found in the archives of the José Ortega y Gasset – Gregorio Marañón Foundation in Madrid along with other letters that show the relationship between the Spanish author and representatives of the neo-Kantian Marburg School, including its founder Hermann Cohen, as well as Paul Natorp, Ernst Cassirer, and Heinz Heimsoeth.

El liberalismo de Ortega no se ha estudiado atendiendo a sus fundamentos filosóficos y en lo que serían las diferentes etapas del pensamiento del filósofo español. Desde el neokantismo de mocedad, Ortega entiende el liberalismo como “ideal” o ley de la moralidad. Posteriormente, desde la “fenomenología” y en la génesis del raciovitalismo, a la altura de 1914, la libertad no responderá ya a la idea del deber moral, sino del tener que ser personal en un “mundo vital” (Lebenswelt). En un tercer periodo de su obra, desde 1929 en adelante, Ortega concibe la libertad como un sentimiento o idea radical sobre la vida en el contexto de su metafísica de la vida humana como realidad radical, primera y primordial.

This volume treats the topic of rationality developing a perspective that integrates elements of philosophy of language, phenomenology, pragmatism, and philosophy of life. The two reference authors, Wittgenstein and Ortega, are contemporaries but come from different philosophical traditions. Wittgenstein's early work was influenced by logical positivism. Later he developed an influential approach to philosophy of language. Ortega was influenced by Neo-Kantianism, perspectivism, life philosophy, and phenomenology. On this basis, he developed an independent approach that has become known as ratiovitalism. Astonishing affinities between their respective reflections on rationality motivated the experiment of bringing the different approaches into a synergetic relation. Both investigate the structures and limits of rationality, emphasize the importance of basic beliefs, and criticize the restriction of rationality concepts to the intellectual sphere. The contributions of the volume focus on: dynamics of belief and knowledge, implicit and explicit knowledge, the concept of \"vital reason\", the role of world-pictures and forms of life, questions regarding certainty, ignorance, doubt, and madness, as well as matters of pluralism and relativism.

This paper intends to expose and analyze the arguments of philosopher Julián Marías regarding the problem of ethics of the human person, from the approach of human life and the metaphysical anthropology. A member of the “School of Madrid”, his thinking has been inspired by the philosophy of Ortega y Gasset. This paper seeks to recover that influence’s context, to introduce the main concepts of its theoretical model, and to present their considerations about life as a projective, biographical argument, an installation of the circumstances and mundane situations, as ways of constructing the person.