Billy Sunday, 事發1900年前後,發明簡易得救系統:用心理方法叫人行出講壇前,叫講壇呼召(Altar Call),或者輝輝手,那個人就為之得救.Sunday很自豪地宣稱可以將成本降低到$2一個靈魂.
Sunday told sponsoring pastors, "You can't conduct business as you did twenty-five years ago, neither can you religion. This is a day of specialist." ..pp52 The Graham Formula