The law of cause and effect is a fundamental concept within Buddhism governing all situation. Buddhists believe in a just rational of karma that operates automatically and speak in terms of cause and effect instead of rewards and punishments. It's a fundamental principle for all living beings and all things that if one sows good deeds, he will surely reap a good harvest; if he sows bad deeds, he must inevitably reap a bad harvest. Though the results may appear quickly or slowly, everyone will be sure to receive the results that accord with their actions. Anyone who has deeply understood this principle will never do evil.