A while back we were studying the various spiritual movements at our church. At the same time our small group was holding a 24/7 prayer meeting. During one of my turns in the sanctuary I was walking past the white board on which the dispensations and movements of God over the past few hundred years were neatly written out. I may disturb some Bible scholars here, but the thought ran through my mind of what's the point of studying such things if you overlook the driving factor of the waves of the Lord's presence: His great encompassing love.
Man has been called to subdue, but that was never to include God. We try to explain Him, write Him up in a descriptive paragraph, paint Him in detail. Buts its no use. He is greater than we could even imagine. Its when man gets too wrapped up in the formula, that God shows up in a new way as if to say, "Think you've got me figured out? Check this out!" And if we're not careful the change disturbs us. "That's not God," is almost always our first thought. There are very few that genuinely and unreservedly embrace these movements. Our tendency is to weigh it out, wait until its safe.
You really have to know the Father to recognize Him when He surprises you. Would I have recognized Jesus if I had seen Him walking around in my hometown? If I was at the Pentecost prayer meeting would I have known the manifestation of the Holy Spirit was of God? It really is about relationship. When you really know someone, you'd recognize them no matter what span of time had passed. No matter what they were wearing, you would know it was them. God calls us into a deeper walk with Him. He desires for His people to truly know Him. That is when He can reveal His heart to us, tell us His secrets, and trust us to do what He's called us to do.