One source is the belief that salvation is solely due to an experience of conversion, rather than to what happened on the Cross of Christ. Most Christians today define their salvation exclusively in terms of what happened to them subjectively, having no notion whatsoever of the objective basis for their salvation. This in turn focuses all of their attention on anxiously caring for that experience. I suggest that another source is the common modern presupposition that experience is the foundation for belief . This cannot be so, however, because experiences do not happen in vacuums.
People experience something or someone.
And simply because the Who or What was encountered in a religious setting does not mean that the encounter was sent by God. To those who say that experience is The Standard for evaluating truth, goodness, beauty, etc. Jesus himself cries out that God had forsaken him. Well, as Luther pointed out, we had better believe the theology of the Bible. When we allow experience or feelings to guide our faith we will end up in a ditch.