Ann Griffiths (1776-1805) is regarded as the greatest female poet who wrote in Welsh, and one of the greatest of hymn writers. Her Christian journey began at the local parish church, but she later sought spiritual enlightenment among the Methodists. She remained an Anglican, however, since it was not until after her death that two separate denominations were formed. Although Ann had had little formal education or experience of life beyond her small Welsh village, her hymns and letters reveal a mind of unusual capacity and a remarkable fusion of love and knowledge. Her writings combine deep feeling with intellectual and theological clarity, including a firm grasp of Trinitarian and Christological doctrine. The 'heaven' she described as a 'sea of wonders' is available to us here and now. The life and writings of this remarkable woman are made accessible to us in this short introduction by Llewellyn Cumings.