"William Abraham reflects further on evangelicalism’s “ecclesial ambivalence,” and claims that agreement on sola scriptura, often thought to be the only source of unity in the movement, has actually multiplied disputes because it spawns differing interpretations. Abraham shows that evangelicals, despite these differences, have ironically played a pivotal role in the history of ecumenism. He makes the intriguing suggestion that orthodox theology’s search for agreement on authority and epistemology has been misdirected, and that in fact the early churches reached agreement on theological essentials without agreement on either authority or epistemology. If unity has been elusive among evangelicals, John Witvliet insists that evangelicals have generally shared a deep resistance to ritualism and ceremonialism in worship, because of their demand for heartfelt ardor. According to Witvliet, evangelical worship has highlighted preaching, congregationalism singing, classical evangelical hymns, and personal and family devotions. Evangelicals are divided between memorial and participationist views of the Lord’s Supper, with similar differences in their attitudes toward baptism. Recently, Witvliet says, some strains of evangelical worship have yielded to sentimentalist and consumerist temptations."