Sum and Substance: Comprehending Yourself, Your Universe and Your World
As of my last knowledge update in April 2023, 'Sum and Substance: Comprehending Yourself, Your Universe and Your World' by William Martin does not appear to be a widely recognized book; therefore, I cannot provide a summary of its content in one sentence or otherwise. If the book has been published more recently, I recommend checking the latest descriptions or reviews for a summary.
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