When someone has their hand on their chest, this is one detail that you don't want to over-look. The lady on the left side of this image has a full palm contact with her upper chest-sternum-heart area. This indicates a deep, heart-felt and empathy. This nonverbal has a very high "Sincerity Quotient". In contrast, if you hear someone trying to verbally express empathy, but only their fingertips or fingers make contact with their chest, you should (internally) question their sincerity.