I've been reading quite a bit about the topic of Charismatic ecstatic utterances/private prayer languages from a historical standpoint. I personally do not hold firmly to a cessationist viewpoint, but it is my understanding that if the gift does still operate it must do so within its Biblical context; through known human languages. It seems to me that, excepting the Montanists and later the Irvingites, it was a generally accepted and understood for almost 1900 years that known human languages were spoken by the Apostles on the day of Pentecost and following. I wish I could find my study notes that led me to this conclusion, but it seems to me that Origen, Epiphanius, Iraneus, Tertullian, and Cyril of Alexandria all held to this understanding. For what it's worth, here is some documentation I've found rather fascinating. http://charlesasullivan.com/4512/cyril-of-alexandria-on-tongues-i-corinthians/ This fellow has done quite a bit of extensive research on the topic of early history and seems well-read. The information he has accumulated on his website is incredible. He also forwarded me some interesting information by Gary McGee (a Pentecostal researcher) that appeared to tie personal prayer/heavenly languages to the late 1800's missions crisis, but they are in PDF form and I am unable to share them here (anyone who is interested may PM me their email address and I will send them to you). Curious as to everyone's thoughts concerning the early church's understanding of this topic. Please stay OT. I'm aware that ecstatic utterances is a rather volatile subject, so if your argument doesn't have something to do with the early church's understanding of Pentecost/languages I respectfully ask that you refrain from posting. Thanks!