kindred spirit
Also, kindred soul. An individual with the same beliefs, attitudes or feelings as oneself. For example, Dean and I are kindred spirits when it comes to spending money—we're both tight. [Mid-1800s]
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The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.