Hmm

… In Praise of Religion’s Dark Side | Front Porch Republic. (Hat tip, Dave Lull.)

“I am a man of unclean lips” is the cry that bursts forth from every one of us, the Jewish theologian Will Herberg writes, “whenever the force of existence smashes through the hard crust of egocentric self-deception.”

I' not sure it is a dark side. It just isn't sentimental. Otto's The Idea of the Holy is a great book.