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The Work of today is the same Work as always, but in the language and circumstances of today. It incorporates the same principles - a program for evolution. Its meaning is in an area completely different from the things usually considered. An 'unknown' area, actually - dealing with the 'next world'. Though it's unknown it can be smelt, touched or intuited at times. But it is, for the most part, unknown. So, how do you talk about the unknown?

taken from: 
The Sermon On The Mount