such as , its surrounding culture tends to exclude systematic use of the psalms in weekly worship, sidelining lament from regular worship practice. The emphasis on praise, and on an interpretation of 'worship' that is overwhelmingly positive, can lead to avoidance of the psalms of lament. Michael Vasey writes: "Scripture is, of course, full of lament – and devotes its finest literary creation to warning the godly against quick and easy answers. The power of many of the psalms we are embarrassed to use lies precisely here. Of all this there is little echo in our contemporary reading." Whereas denominational churches generally use a weekly lectionary that gives a broad range of scriptural themes, including selected psalms on those themes, CWM churches tend not to have an agreed lectionary and the consequent agreement on using a broad range of material. Pope John Paul II, concerning the role of music in regard to worship, wrote, "today, as yesterday, musicians, composers, liturgical chapel cantors, church organists and instrumentalists must feel the necessity of serious and rigorous professional training. They should be especially conscious of the fact that each of their creations or interpretations cannot escape the requirement of being a work that is inspired, appropriate and attentive to aesthetic dignity, transformed into a prayer of worship when, in the course of the liturgy, it expresses the mystery of faith in sound." Some have noted that contemporary worship songs often reflect the social climate of individualism as the lyrics emphasize personal relationship with God, even within a group context. Interviewed in Christianity Today in 2011, Grove City College professor T. David Gordon said contemporary music was not easier to sing or better than traditional music, but familiar. If this style of music was all people listened to, then that would make them happy. He also said praise bands had a hard time finding good music, but played the contemporary music because the church wanted it, with the only criteria being how contemporary the music sounded. Gordon also said churches were adding hymns to contemporary services, but that in the past the main concern had never been how new the music sounded. Gordon said in 2014 that contemporary music could not be as good because one generation could not compete with 50 generations of hymns, and even the contemporary songs were in some cases just the old hymns with an updated sound. Writers of