Based on the writings of John of the Cross, this paper demonstrates the difference and inequality between mystical experience and "science" (scholastic theology), while simultaneously showing that he could not separate them. Although the mystic did not intend to address theology through his poetry, nor create a systematic theological work, his texts establish a new epistemological approach. Theologians like Jesús Manuel García frame his writings within the context of systematic-theological considerations on method. John of the Cross did not view experience and scholastic theology as mutually exclusive; rather, he believed they must collaborate, despite their different directions and roles. In the prologue to the Ascent of Mount Carmel, he writes that neither human science nor experience can fully reach the sublime state of perfection. Only those who have endured the "Dark Night" can evaluate it, yet even they cannot fully articulate it. To describe this Night, John of the Cross states he relies on neither science nor experience exclusively, as both can be misleading. However, in the prologue to the Spiritual Canticle, a new element emerges: poetry as a locus of knowledge. This resolves the tension between scholastic theology—a science of discursive understanding and conceptual reflection—and experience, which acts beyond comprehension or explanation. Experience is spontaneously connected to the Spanish concept of pasar (to pass through) or el haber pasado (having passed through): a transition that leaves an imprint. By living through this transition, one acquires knowledge. In the prologue, John of the Cross speaks of "Mystic Intelligence." For him, this is a "total knowledge" that appears as "unknowing" when compared to discursive-conceptual knowledge. This sublime form of knowing will be examined closely in the context of his poetry as a source of knowledge. The paper asks how his approach alters the discourse of theology today.