Placing Senegalese scholar and Sufi Shaykh, Ibrahim Niasse (1900-1975), in dialogue with the German philosopher Martin Heidegger (1889-1976), this book considers meditations on Being through the affects of human experience.

At the heart of the divergence between these two philosophers lies a fundamental difference in their conceptions of time: Heidegger views death as the definitive end of existence, whereas Niasse envisions existence as oriented toward apocatastasis-a return to divine origin. Yet Philipp Valentini moves beyond this contrast to examine how both philosophers root their inquiries into Being in the realm of human affect. He draws compelling parallels between their treatments of shared affective states such as dismay, vengeance, relationality (being with another), and the experience of slow, extended time.

While previous studies have approached the relationship between Heidegger and the Islamicate intellectual tradition either historically or through speculative hybridization, Valentini offers a more nuanced comparative analysis. Through an insightful juxtaposition of modern Sufi and Heideggerian thought, Valentini reveals how both thinkers engage affect under the guidance of overarching metaphysical ideas. Ultimately, On the Affective Moods of Being invites readers to reflect on a profound question: what guiding idea should shape our affective experience of Being?