"We none of us are entirely sure that you, the reader, are not just ignoring our elegant devices; it is really dangerous to be over-confident about this, or over-analytical, as we can never simply assume that exquisitely crafted codes work - yes, they are often wily and very often I have discovered a lurid symbol which is likely to be a buried message, secret or even a completely and totally clandestine image which has within it an eccentrically ordered and complex nucleus of visual clues, even including some weird xylophones, bizarre yes, but these could be the paintings which will disclose or unveil the most perilous truths to have existed."
The preceding sentence, I can now reveal, has been written in the Priory of Sion code. You take the first letter from every fourth word, starting with the first: so the first word, then the 5th, then the 9th, the 13th, and so on. It spells out a message about the future of western civilisation that is too terrifying to be stated openly.