The Latin phrase ``solve et coagula'' (dissolve and coagulate) appears in Jung's Foreword to Mysterium Coniunctionis: An Inquiry into the Separation and Synthesis of Psychic Opposites in Alchemy. He comments on the use of the phrase by the spiritual alchemists of the late Renaissance, whose work he believes was the precursor to modern depth psychology's efforts to dissolve pathological personality structures so that personal character can reform in a more solid and incorruptible way. Jung makes the parallel explicit when he says:

[T]he alchemist saw the essence of his art in separation and analysis on the one hand and synthesis and consolidation on the other.