“Advised a young diplomat "to tell the truth, and so puzzle and confound his enemies."”
Henry Wotton (1568–1639) English ambassador
Attributed. E.g., Vol 24, Encyclopedia Britannica of Arts, Sciences, and General Literature, page 721 https://books.google.com/books?id=_GlJAAAAYAAJ&pg=PA721&lpg=PA721&dq=truth+wotton+confound+advice&source=bl&ots=-cGk3UDLLj&sig=ltOR1xtI9WFic1JWKiFmIZ8Yce0&hl=en&sa=X&ved=0ahUKEwjVkZCsj-jRAhXCyFQKHTmsCkAQ6AEIODAG#v=onepage&q=truth%20wotton%20confound%20advice&f=false (9th Ed. 1894). <br class="br">Compare Mark Twain who, in Following the Equator, said "When in doubt, tell the truth" (which is often mis-quoted as containing an additional clause providing "it will confound your enemies and astound your friends").