The thesis explores how, and to what extent, Pentecostals can benefit from engaging with Patristic sources. I believe engagement with Patristic sources will greatly benefit Pentecostals in many ways. Analysing the benefits of such engagement could strengthen and broaden the growing interest in Pentecostal ressourcement. The primary question will be answered by asking two subsidiary questions. First: how and why have Pentecostals approached ressourcement, tradition and the Christian past in the 20th and 21st centuries? This question arises because it helps to locate the Pentecostal identity in relation to its engagement with tradition. This discussion is necessary to build a case for engagement with patristic sources in the future. Second: to what extent can John Wesley’s approach be used as a theological foundation for future developments in Pentecostal ressourcement? Given Pentecostalism’s close theological connection with John Wesley, his extensive engagement with patristic sources could open avenues for future developments in Pentecostal ressourcement.