Isaac Penington was the son of the mayor of London. In 1658 he joined the Society of Friends (the Quakers). He was such a zealous follower of Christ and filled with such faith that he was jailed six times for proclaiming his unshakable convictions. He spent five years in prison as a result of his desire to worship in a manner other than the one prescribed by the established church. For a Quaker, this meant through silence as opposed to liturgy and sacraments and sermons.
He also refused to take an oath in court (which he believed was forbidden by God in Scripture). As a result, he and his wife lost all their property. The hardships he encountered in the following years helped him to understand the growth that comes through suffering. Penington offers light and truth and comfort for all who suffer and are afflicted today as he was in his day. Penington's letters he wrote to friends reveal his own tenderness, sympathy, and unwavering faith.