This book emphasizes the ontological foundation of signs, a semiotic perspective that opens the way to culture. It extends the reader's understanding of the semiotic process by problematizing the concept of "sign" beyond its classical definitions. Its didactic explanations allow a progressive design of the spiritual function of signs, and, as such, it will appeal to students concerned with understanding human nature. The book will also be of interest to professors and researchers, as well as anyone interested in the field of the Humanities.