What do we think about the person who believes their destiny is ruled by the stars, or is mapped on the lines across their palm, or revealed in the tea leaves at the bottom of a cup? Are they any less delusional than the person who believes God wants them, and only them, to undertake some special task? What are the measurable differences? Could they all be signs of insanity or just some harmless beliefs?
From a psychological perspective a delusion is really a persons' explanation of their...

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