Gratitude in international literature is associated with catharsis and reciprocity. These are the two main "goals" of people expressing gratitude.
It makes us happier: A simple interaction of five minutes a day with those who we are grateful for can increase our long-term happiness at a rate greater than 10%
Did you know gratitude is one of the basic ingredients of our happiness? Multiple studies have proven that showing everyday gratitude (to ourselves, to life, to other people) increases our life-satisfaction and makes us happy.