Rumi has remained an influential figure in Islamic mystical discourse since the thirteenth century, while also extending his impact to the Western spiritual arena. However, his ideas have frequently been interpreted within the framework of other mystical, philosophical, or religious systems. Through its novel approach, this book aims to reformulate Rumi's practical mysticism by employing four methodological principles: a) mysticism is a coherent structure with mutual interconnection between its parts; b) the imposition of alien structures to interpret any particular mysticism damages its inward coherency; c) practical mysticism consists of two main parts, namely practices and stages; and d) the proper use of comparative methodology enables a deeper understanding of each juxtaposed system. Eckhart's speculative mysticism, which differs from and enjoys similarities with the love-based mysticism of Rumi, provides a "mirror" that highlights the special features of Rumi's practical mysticism. Such comparison also allows a deeper comprehension of Eckhart's practical thought.