Michael Slote is no doubt the most radical and yet consistent sentimentalist philosopher that we have ever seen (and perhaps also will ever see). In his previous books, sentimentalism is developed not only as an ethical theory concerned about an individual’s emotions and actions but also as a political theory about a just society. This is significant, since one of the commonly perceived weaknesses of virtue ethics—of which Slote’s moral sentimentalism is a version—in comparison with its rivals, deontology and consequentialism, is its inability to develop a robust political philosophy. But Slote did not stop there. He develops sentimentalism not only as a normative moral theory but also as a metaethical theory, using our moral emotions as the foundation of moral approvals and disapprovals. If you are wondering whether Slote goes too far in making such a versatile use of emotions in so many different areas, then hold fast before you read the book under review here! As indicated by the title, it is about a sentimentalist theory of mind; and it is not over yet: as announced by the title of a fairly long appendix (173–203), he is also going to develop a sentimentalist virtue epistemology (at this moment of writing, I have learned that the book is already finished and will be forthcoming very soon). In this book, arguing against the prevalent rationalist account of human mind as purely rational and cognitive, Slote attempts to show not only that there are aspects of the mind that are not purely conceptual, mathematical, or scientific, as can be expected, but also that, as not easily expected, even those aspects considered to be conceptual, mathematical, or scientific are not as pure as the rationalist accounts claim them to be but are shot through with emotions. In addition to a short preface, a short introduction, a short conclusion, and a long appendix (review of which is reserved until the book on the topic is published), the book consists of six chapters. In Chapter 1, “Epistemology and Emotion,” Slote revisits the notion of empathy, the central topic of at least two of his previous books, but this Dao (2015) 14:307–313 DOI 10.1007/s11712-015-9430-5