Great question. For me what I think has a large influence on me. I can get into terrible negative thought loops that can paralyze me with fear for days. I can also have periods where I feel optimistic because I think of possible solutions to my issues. From reading and studying a little bit about mental health, I think learning how to deal with your thoughts is one of the most important things humans can do. Yes, there is the amygdala that can make you do things without your thoughts, but beyond that it's almost all about how you think about things.