The paper demonstrates the regenerative, stabilizing and restorative value of the epistemological, hermeneutical and homiletical principles in Anna Carter Florence’s Preaching as Testimony for the life and preaching ministry of pastors, through a study of a congregation in Northern Ireland. In particular, the study explores how Florence’s homiletic can be applied by gay and lesbian pastors in predominantly heterosexual congregations where an ambivalent attitude to gay sexuality prevails. Using tools of narrative reflection and applying the insights of systems theory, the study shows how pastors in such situations may become alienated from their congregations, and from authentic performance in their pastoral role. Testimonial preaching is a radical, effective and appropriate response, equipping the preacher to overcome internal and external systemic obstacles. Although focusing primarily on the benefits for the preacher’s sense of fulfilment, integrity and performance, the potential benefit to, and response of, the congregation is also treated briefly.