" When you see someone smile, does it naturally make you want to smile back? When you are irritable, do you find that people mirror your irritability? When someone yawns around you, do automatically do the same? When you hear someone celebrating, do you feel inclined to join in and celebrate too? Your responses are not forced, but instinctual and empathetic. "

― Susan C. Young , The Art of Body Language: 8 Ways to Optimize Non-Verbal Communication for Positive Impact (The Art of First Impressions for Positive Impact, #3)