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  4. Mark Twain
  5. Any emotion, if it is sincere, is involuntary.

Any emotion, if it is sincere, is involuntary.

Mark Twain
Motivation, Integrity, Emotional
Mark Twain (2014). “Mark Twain on Common Sense: Timeless Advice and Words of Wisdom from America's Most-Revered Humorist”, p.22, Skyhorse Publishing, Inc.
Any emotion, if it is sincere, is involuntary.