Spiritual endowment for today’s believer is possible. This possibility is studied and compared to that of the early church fathers. This journey to the reception of Holy Spirit enduement of the early Pentecostal forefather was not short and instantaneous. There is a waiting period that is observed and reported. This book revisits the biblical significance of tarry’s treatment in Luke 24:49. The key principle of waiting on the timing of God’s provision of power was commanded. The promised enduement is necessary to accomplish the job description God has given all Christians. The reader will observe the results of a tarry presented to encounter the Holy Spirit experience. The word for power that Luke uses in Luke 24:49 and Acts 1:8 reference that ability to do work. Acts 1:4 placed emphases on them not leaving Jerusalem without the promise. The potential value of this topic is in its impact on the reader’s personal life. The project conducts a hundred surveys, interviews, and research of historical tarry data. The successful tarry, as Luke presents it, will yield an authentic encounter with the promised Holy Spirit, and the production of guidelines for Christian mentors to tarry for endowment.