Jim Rohn said, “Only by giving are you able to receive more than you already have.” There is a science behind why generosity increases happiness and improves well-being. Science has confirmed that giving makes us feel happy, is good for our health, and evokes gratitude. One Harvard Business School report even concluded that the emotional rewards are the greatest when our generosity is connected to others. But so many forms of giving back involve giving your time, mentoring others, supporting a cause, fighting injustice, and having a pay-it-forward mentality.