This book invites the reader to a spiritual odyssey. It opens before the reader an itinerary for venturing forth with God, aided by the astonishing writings of seventh-century Isaac the Syrian. Long-lost manuscripts have recently been discovered, translated, and published in scholarly works, this book aims to make them accessible to readers who want to experience their wisdom personally and so progress in a spiritual adventure. Isaac's writings are explored through the lens of his beloved metaphor of diving for pearls, which opens many avenues for reflection and spiritual practice.This is a book to inspire preachers and teachers on prayer. It will stimulate and offer a resource to spiritual directors and retreat givers, and it provides material ideally suited to quiet days and retreats. A practical resource, it includes questions for individual or group reflection at the end of every chapter and a range of prayer exercises. Above all, it is offered to those who want to leave the shallows and launch out into the deep in their spiritual journey.