Final answer:
The three theological divisions in the Pentecostal movement during its first 16 years were Holiness-Pentecostal, Oneness-Pentecostal, and Trinitarian-Pentecostal.
Step-by-step explanation:
The three theological divisions in the Pentecostal movement during its first 16 years were Holiness-Pentecostal, Oneness-Pentecostal, and Trinitarian-Pentecostal.
The Holiness-Pentecostal division emphasized the belief in sanctification as a second work of grace after salvation, with an emphasis on holy living and separation from worldly influences.
The Oneness-Pentecostal division taught the belief in a modalistic understanding of the Godhead, where God is seen as one person who manifested Himself in different modes or roles throughout history, including as Jesus Christ.
The Trinitarian-Pentecostal division is characterized by the belief in the traditional Christian doctrine of the Trinity, with God being one being in three persons: Father, Son, and Holy Spirit.