Using a paraphrase of the last sentence of Wittgenstein's Tractatus as its basis, the book Whereof we cannot speak, thereof we must sing aims to apply the standard analytical and linguistically oriented approach of philosophy to the problems of sapience and understanding in all the traditional realms of spirit - including art - with a particular focus on music. The thread running through all of the individual chapters is a critique of the correspondence theory of truth (in its role of being a paradigm of knowledge that was adopted by the positive sciences) and its replacement by a refl exive conception of truth exemplifi ed by German idealism and its thesis that all knowledge is self-knowledge.