The Law of Karma is one of the fundamental doctrines not only in Hinduism, but also in Buddhism, and in Jainism. As a man sows, so he shall reap. This is the Law of Karma. If you do an evil action, you must suffer for it. If you do a good action, you must get happiness. There is no power on this earth which can stop the actions from yielding their fruits. Every thought, every word, every deed is, as it were, weighed in the scales of eternal, divine Justice. The Law of Karma is inexorable.