Meister Eckhart is considered one of the most significant and influential figures of the Middle Ages. To this day, his work has lost none of its relevance and fascination. As a preacher, theologian, and philosopher, he taught the unity of God and man. While his German sermons are characterized by rhetorical emphasis, he argues with all the rigor of scholasticism in his Latin treatises for his central concern: the divine nature of the human soul. This intertwining of mystical preaching and philosophical justification represents a peak of philosophical mysticism. Christian Jung provides a concise overview demonstrating how Meister Eckhart unites the spirituality of God and the rationality of man, the "Seelenfünklein." The author takes into account all layers of Eckhart's work, from the early Parisian treatises to the Latin main work, the Opus.