Gratitude has rewarding connections in brain, research finds

https://www.washingtonpost.com/national/health-science/new-thoughts-about-gratitude-charity-and-our-brains/2018/12/21/238986e6-f808-11e8-8d64-4e79db33382f_story.html?noredirect=on&utm_term=.e42ea9a5094f