Within Pentecostalism, there is a belief that speaking in tongues serves two functions. Tongues as the "initial evidence" of the third work of grace, baptism with the Holy Spirit, and in individual prayer serves a different purpose than tongues as a spiritual gift. All Spirit-filled believers, according to initial evidence proponents, will speak in tongues when baptized in the Spirit and, thereafter, will be able to express prayer and praise to God in an unknown tongue. This type of tongue speaking forms an important part of many Pentecostals' personal daily devotions. When used in this way, it is referred to as a "prayer language" as the believer is speaking unknown languages not for the purpose of communicating with others but for "communication between the soul and God". Its purpose is for the spiritual edification of the individual. Pentecostals believe the private use of tongues in prayer (i.e. "prayer in the Spirit") "promotes a deepening of the prayer life and the spiritual development of the personality". From Romans 8:26–27, Pentecostals believe that the Spirit intercedes for believers through tongues; in other words, when a believer prays in an unknown tongue, the Holy Spirit is supernaturally directing the believer's prayer.