Being and Time previous philosophies that had become entrenched and hidden within the theoretical attitude of the metaphysics of presence. This use of the word "Destruktion" is meant to signify not a negative operation but rather a positive transformation or recovery. In "Being and Time" Heidegger briefly undertakes a destructuring of the philosophy of René Descartes, but the second volume, which was intended to be a "Destruktion" of Western philosophy in all its stages, was never written. In later works Heidegger uses this approach to interpret the philosophies of Aristotle, Kant, Hegel, and Plato, among others. "Being and Time" is the major achievement
Thomas Vaughan (philosopher) out with an alchemical collaborator, Edward Bolnest, over money matters and alleged broken promises, and the matter came to litigation after Bolnest had threatened violence. Vaughan was accused as part of this affair of spending "most of his time in the study of Naturall Philosophy and Chimicall Phisick". He is reported as having confessed that he had "long sought and long missed... the philosopher's stone." Thomas Vaughan (philosopher) Thomas Vaughan (1621 − 27 February 1666) was a Welsh philosopher and alchemist, who wrote in English. He is now remembered for his work in the field of natural magic. A Royalist