According to Margaret Barker's groundbreaking theory, temple mysticism underpins much of the Bible. Rooted in the cult of the first temple in ancient Judaism, it helps us to understand the origins of Christianity. Temple mysticism was received and taught as oral tradition, and many texts were changed or suppressed or kept from public access. Barker first examines biblical texts: Isaiah, the prophet whom Jesus quoted more than any other in Scripture, and John. Then she proposes a more detailed picture, drawing on a wide variety of non-biblical texts. The resulting book presents some remarkable results.

According to Margaret Barker's groundbreaking theory, temple mysticism underpins much of the Bible. Rooted in the cult of the first temple in ancient Judaism, it helps us to understand the origins of Christianity. Temple mysticism was received and taught as oral tradition, and many texts were changed or suppressed or kept from public access. Barker first examines biblical texts: Isaiah, the prophet whom Jesus quoted more than any other in Scripture, and John. Then she proposes a more detailed picture, drawing on a wide variety of non-biblical texts. The resulting book presents some remarkable results.

Mysticism in Early Modern England traces how mysticism featured in polemical and religious discourse in seventeenth-century England and explores how it came to be viewed as a source of sectarianism, radicalism, and, most significantly, religious enthusiasm.

Margaret Barker believes that Christianity developed so quickly because it was a return to far older faith—far older than the Greek culture that is long-held to have influenced Christianity. Temple Theology explains that the preaching of the gospel and the early Christian faith grew out of the centuries' old Hebrew longing for God's original Temple.

Rachel Elior demonstrates convincingly how the Jewish mystical tradition crystallized in its early stages. She attributes its origins to priests prevented by circumstances from serving in the Temple: replacing the earthly Temple liturgically and ritually with a heavenly Merkavah and heavenly sanctuaries known as Heikhalot, they created a mystical world in which ministering angels replaced Temple priests, thereby giving Judaism a new spiritual focus.