After years of study and research, Frédéric Schiffter presents "Sentimental Philosophy: Essays on Lucidity," an essay in which, to explain his theory, he uses as parameters only thinkers who wrote about their own personal experience. In the book, Schiffter draws on the authors who have influenced his life and, through aphorisms, addresses themes that afflict humanity—love, suffering, wisdom, death, time and workload, pessimism in the face of chaos, sadness, the vulgarity of the masses, nihilism as an acute consequence of tragedy, and other reflections that will help the reader examine their own daily lives. This is a serious and intimate work, not a philosophy of feeling or a sentimentalization of the philosopher. Discussions with philosophers, as well as brief lessons from the life of a pessimistic author without excessive love for his contemporaries, these short chapters are also reflections on particular aspects of the work of important philosophers. The author's analysis is based on 10 intellectuals: Friedrich Nietzsche, Fernando Pessoa, Marcel Proust, Arthur Schopenhauer, Ecclesiastes, Michel de Montaigne, Chamfort, Sigmund Freud, Clément Rosset and José Ortega y Gasset. “Living well is not necessarily living.” (Frédéric Schiffter)