"If we walk in the light, s he is in the light, we have fellowship one with another" (1 John 1:7)
God desires to advance His work among men by frequent outpourings of the Spirit upon His people as they need them and are prepared to receive them.
The Bible encourages us to expect "showers of blessing" and "floods upon the dry ground." It was impossible for the outpouring which came at Pentecost to affect persons who were not present or congregations not yet in existence.
The Bible does not sponsor the chilling doctrine of once-for-all blessings. It is obvious that the spiritual benefits of Pentecost must be prolonged beyond the lifetimes of the persons who were the first to receive them.
In brief, the teaching of the New Testament is that the outpouring at Pentecost was the historic beginning of an era which was to be characterized by a continuous outpouring of the Holy Spirit.
The Holy Spirit comes with the light of truth in one hand, so to speak, and the blood of Christ in the other. What the light reveals, the blood cleanses.
~A. W. Tozer~