Some of the positive feedback loops instantiated by body language can occur beyond the private confines of subjective experience, in the social space you share with other people. If your posture is poor, for example—if you slump, shoulders forward and rounded, chest tucked in, head down, looking small, defeated and ineffectual (protected, in theory, against attack from behind)—then you will feel small, defeated and ineffectual. The reactions of others will amplify that.
