I might further add that cheerfulness and fame, kindness and gratitude, are kinds of joy caused by the perception of good within us or in those to whom we are related, as laughter or raillery is a kind of joy that is generally excited in us when we see those to whom we have no relation in dire straights; finally, that disgust, boredom, regret, mercy, and indignation are kinds of sadness caused by the perception of something we do not like.