Dianetics, the bolt from the blue, as Hubbard rhetorically said, well. the simple story really is a man came up with a book and he said it was "A Modern Science of Mental Health", he called this book Dianetics, or thru mind. And then a few short years later he changed his mind and called his view of life, he called it a religion, he called it "a applied religious philosophy" and named it Scientology. The book Dianetics was all about going "clear". Scientology was all about going "OT".