an evangelical Protestant. In some agnostic historiographies the flaming chalice displayed a vague resemblance to a cross in some stylized representations, relying on the sepulchral traditions of the Hospitallers. Many Unitarian Universalist congregations light a chalice at the beginning of worship services. Other symbols include an off-center cross within a circle (a Universalist symbol associated with the Humiliati movement in the 1950s, a group of reformist, liturgically minded clergy seeking to revive Universalism). Other symbols include a pair of open hands releasing a dove. Services of worship Religious services are usually held on Sundays and most closely resemble the form and format of Protestant worship in the Reformed tradition. Services at a vast majority of congregations follow a structure that focuses on a sermon or presentation by a minister, a lay leader of the congregation, or an invited speaker. Sermons may cover a wide range of topics. Since Unitarian Universalists do not recognize a particular text or set of texts as primary or inherently superior, inspiration can be found in many different religious or cultural texts as well as the personal experiences of the minister. The service also includes hymn-singing, accompanied by organ, piano, or other available instruments, and possibly led by a song leader or choir. The most recent worship songbook published by the denomination, Singing the Journey contains 75 songs and is a supplement to the older Singing the Living Tradition which contains readings as well. Hymns typically sung in Unitarian Universalist services come from a variety of sources—traditional hymn tunes with new or adapted lyrics, spirituals, folk songs from various cultures, or original compositions by Unitarian Universalist musicians are just a few. Instrumental music is also a common feature of the typical worship service, including preludes, offertory music, postludes, or music for contemplation. Pastoral elements of the service may include a time for sharing Joys and Sorrows/Concerns, where individuals in the congregation are invited to light a candle or say a few words about important events in their personal lives. Many also include a time of meditation or prayer, led by the minister or service leader, both spoken and silent. Responsive readings and stories for children are also typical. Many congregations also allow for a time at the end of the service, called "talk back", where members of the congregation can respond to the sermon with their own insights and questions, or even disagree with the viewpoint