“You are suffering because you did evil in your previous lifetime” or “you will be blessed because you have helped me” are comments that reflect the concept of karma – what goes around comes around. Karma is the concept of cause and effect originating in ancient India and treated in Hindu, Jain, Buddhist, Sikh religions. However, over the years, it has become so popular in western cultures that it has become detached from its Hindu roots. For example, theosophy is a branch of philosophy that seeks to understand the bonds that unite the universe, humanity and the divine. It believes in karma and reincarnation.
So, Karma can be explained with both science and superstition – then there is no reason not to believe in it. My personal experiences have created belief in Karma. Whenever I go through phases of materialism-related arrogance, I am forced back down-to-earth by belittling events. For example, I got into a strange car accident exactly 2 days after I ignored the physical ailments of one my closest relatives – a trash can came flying out of nowhere as I was driving on the highway and damaged the passenger side door/window. And whenever I go out of my way to help someone in need, I am rewarded almost immediately with positive events. For example, I was invited to take charge of a project very close to my heart the day after I provided supportive counseling to a grieving acquaintance.
Call it science or superstition, believing in karma can deter us from undertaking any activities that are harmful to others. In other words, believing in karma may help to create a peaceful world.