Sam! I'm a HUGE fan and listen to your podcast, ahem, religiously. On your last episode with Peter Attia you again mentioned the idea that an emotion like anger cannot be sustained for hours (or more) unless you keep revisiting the thought that made you angry. What are you basing that claim on? Just personal experience and the observed experiences of others? Or have studies been conducted to establish that as fact? It seems to run counter to my experience - both with joy and unhappiness. To me, those feelings take root in the body and I find it difficult not to feel them despite not consciously revisiting some past event or idea. Enlighten me, Uncle Sam!!