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La denominada Metaphysik-Dohna corresponde a uno de los cuadernos de apuntes de lecciones universitarias legados por el conde Heinrich Ludwig Adolph de Dohna-Wundlacken (1733-1843). En el tercer semestre de sus estudios en la Universidad Albertina de Königsberg (invierno 1792/1793) cursa metafísica con el profesor Immanuel Kant, que cuenta a la sazón sesenta y siete años. El manuscrito de metafísica de Dohna-Wundlacken presenta indicios de haber sido copiado directamente en el aula, lo que lo hace especialmente valioso. Contiene las explicaciones kantianas del manual de Baumgarten, Metaphysica (1739). Baumgarten es considerado por Kant como el mejor metafísico de su tiempo. Nada hay de innoble en un manual cuando el objetivo pedagógico no es aprender filosofía, sino aprender a filosofar. Para Kant, aprender a filosofar es «ejercitar el talento de la razón siguiendo sus principios generales en ciertos ensayos existentes, pero siempre salvando el derecho de la razón a examinar esos principios en sus propias fuentes y a refrendarlos o rechazarlos» (Crítica de la razón pura).
IMMANUEL KANT
Königsberg, (1724-1804). Immanuel Kant vivió prácticamente por entero su existencia en su ciudad natal. Estudiante de teología, pronto se introdujo en la filosofía racionalista y en la ciencia natural. La vida que llevó ha pasado a la historia como paradigma de existencia metódica y rutinaria. En el pensamiento de Kant se distinguen varias etapas: la precrítica, caracterizada por su apego a la metafísica racionalista de Wolff y su interés por la física de Newton; la crítica, en la que trata de fundamentar el conocimiento humano y fijar así mismo sus límites; y una final en la que Kant trató de unificar ambas críticas estudiando el llamado goce estético y su finalidad en el campo de la naturaleza.
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