The Golden Sequence: A Fourfold Study of the Spiritual Life

The Golden Sequence: A Fourfold Study of the Spiritual Life by Evelyn Underhill (1933). A public-domain work preserved within the Sophia Aporrheta archive, sourced from the IAPSOP digital library of esoteric and occult texts.

Evelyn Underhill (1875–1941) was a British writer and mystic whose work became foundational in modern studies of Christian mysticism. Her best-known book, *Mysticism*, and her later spiritual writings brought rigorous philosophical and theological attention to contemplative experience and the inner life.