Do you need reasons to be cheerful? Simply changing your thoughts will help

Faced with the question of how to be happy, what else would a Google engineer do than devise an equation? Which is exactly what tech entrepreneur Mo Gawdat did, when — despite enjoying lots of success, wealth and recognition — he couldn’t find any joy in his life.
“Even my greatest blessing, my family, didn’t give me the joy they might have because I couldn’t receive it. In my constant quest for more, I’d become pushy and aggressive — even at home.