Little is known about Australian Pentecostal experiences of spiritual struggles. Contemporary pastoral resources draw heavily upon the writings of the ancient Catholic mystics, particularly St John of the Cross, to provide advice about the experience to Evangelical congregations. However, these resources offer little advice specific to contemporary Australian Pentecostal experience. In addition, despite a growing body of empirical evidence about the experience, psychological literature provides limited information about the events and processes that take place following initiation and prior to resolution of the experience. Spiritual theology draws upon two types of datum, empirical (experience) and Scripture. However, gaps in the empirical evidence prevent the development of a spiritual theology concerning spiritual struggles situated within contemporary Australian Pentecostal experience, spiritualities, and theological traditions. A hermeneutic phenomenological study informed by four voice theory in theology has been designed to address these gaps and to contribute experiential principles suitable for use in the future development of a spiritual theology. This proposal describes the intended research, its background and significance, the key research questions underpinning its design, and the current state of the theological and psychological literature on the subject. It also includes an outline of the proposed methodology, and work plan. If approved, this research will contribute to the body of knowledge about spiritual struggles in theology and psychology and inform Australian Pentecostal pastors’ response to experiences of spiritual struggles within their congregations.