We have heard lots about random acts of kindness and these are certainly good, too. Being kind consciously; however, feeds the soul, because we are choosing this with someone else's well-being in mind. It also increases our own level of happiness as this actually causes a release of dopamine, the brain's "feel good" chemical. Happiness is a lifestyle, and working in small acts of kindness will further strengthen our positivity muscles just like going to the gym.
