Being and Time important, i.e., "Dasein". Heidegger wrote that "Being and Time" was made possible by his study of Edmund Husserl's "Logical Investigations" (1900–1901), and it is dedicated to Husserl "in friendship and admiration". Although Heidegger did not complete the project outlined in the introduction, "Being and Time" remains his most important work. It was immediately recognized as an original and groundbreaking philosophical work, and later became a focus of debates and controversy, and a profound influence on 20th-century philosophy, particularly existentialism, hermeneutics, deconstruction, and the enactivist approach to cognition. "Being and Time" has been described as the most influential version of existential
Philosophy and literature narrative "Philosophus Autodidactus" as a response to al-Ghazali's "The Incoherence of the Philosophers", and then the 13th century Islamic theologian-philosopher Ibn al-Nafis also wrote a fictional narrative "Theologus Autodidactus" as a response to Abubacer's "Philosophus Autodidactus". The German philosopher Friedrich Nietzsche often articulated his ideas in literary modes, most notably in "Thus Spoke Zarathustra", a re-imagined account of the teachings of Zoroaster. Marquis de Sade and Ayn Rand wrote novels in which characters served as mouthpieces for philosophical positions, and act in accordance with them in the plot. George Santayana was also a philosopher who wrote novels and poetry; the