Happiness is felt because it is an evaluation that your expectations are being met or even exceeded. If you win the lottery, you feel happiness because it solves your financial needs and likely exceeds your expectations. If you’re asked out on a date, you feel happiness because it holds the promise of satisfying your romantic needs. In the same way, when you feel sadness, it is an evaluation that your goals are not being met or fall below expectations, and anger might be the feeling that is aimed at whatever is blocking your goals.