This anthology investigates the historical development and thematic consistency of mystical expression within the English poetic tradition from the 13th to the 20th centuries. The collection serves as a comprehensive survey of how poets have articulated the ineffable, utilizing a chronological framework to trace the evolution of spiritual inquiry. By gathering works from diverse eras, the volume provides a structured look at the intersection of theological doctrine and individual visionary experience.

Scholars and literary historians frequently cite this collection as a foundational reference for understanding the trajectory of religious poetry in the English language. Readers often note the dense, contemplative nature of the selections, which require careful engagement to fully grasp the theological nuances presented.