Traditional Pentecostal worship has been described as a "gestalt made up of prayer, singing, sermon, the operation of the gifts of the Spirit, altar intercession, offering, announcements, testimonies, musical specials, Scripture reading, and occasionally the Lord's supper". Russell P. Spittler identified five values that govern Pentecostal spirituality. The first was individual experience, which emphasizes the Holy Spirit's personal work in the life of the believer. Second was orality, a feature that might explain Pentecostalism's success in evangelizing nonliterate cultures. The third was spontaneity; members of Pentecostal congregations are expected to follow the leading of the Holy Spirit, sometimes resulting in unpredictable services. The fourth value governing Pentecostal spirituality was "otherworldliness" or asceticism, which was partly informed by Pentecostal eschatology. The final and fifth value was a commitment to biblical authority, and many of the distinctive practices of Pentecostals are derived from a literal reading of scripture.