The most terrifying thing I can think of is being alone - and I mean utterly alone like no one else in the world alone - at night. That's the nucleus of the first story in my collection and it's also where the title came from for the book.
The Vedanta recognizes no sin it only recognizes error. And the greatest error says the Vedanta is to say that you are weak that you are a sinner a miserable creature and that you have no power and you cannot do this and that.