Kevin DeYoung takes a look at mysticism. What it is, where it can lead and why it is dangerous.
go read the whole thing, but this is how he ends it:
The pattern has been repeated many times. People start to pay less and less attention to Scripture, saying it has errors or it can’t be understood or it’s less spiritual than the Spirit within us. Exuberance, courage, and activity follow as people feel alive and less shackled by “tradition” and fixed propositions. With their new found inner truth, these people grow dissatisfied with sermons, notions of authority, and Church-as-we-know-it. More exuberance. But eventually the excitement wears off. The activity dies down. What’s left is the internal Word, which, it turns out, is no different from our own opinions, convictions, and desires.
Without an outer, objective Word, the internal Word always gives way to rationalism, because in appealing to our inner sense of things, we end up just appealing to our own reason. Over time, then, Scripture is increasingly silenced, as we continue doing and thinking what we want, and Scripture is consulted only to confirm what we already “know.” The result is a cold, lifeless church, without the power of God or the truth of God’s word.