Observation is like a muscle. It grows stronger with use and atrophies without use. Exercise your observation muscle and you will become a more powerful decoder of the world around you.
Joe NavarroThe majority of individuals view their surroundings with a minimal amount of observational effort. They are unaware of the rich tapestry of details that surrounds them, such as the subtle movement of a person's hand or foot that might betray his thoughts or intentions.
Joe Navarro