The conflict between new and old, traditionalism and modernism, or conservativism and reformism is not a new one. In fact, its history dates back to centuries before the conflict between tradition and modernity. One can probably say the recent conflict is the continuation of the same array. In this article, the author is going to study traditionalism and modernism and the ideas of each one of them. According to the author, tradition (the legacy of the past), is the result of the knowledge and reason of successive generations which have passed all the tests through the history successfully. In order to protect this heritage, we need to be conservative; and in order to extend it, we need to be reformist. Both of these approaches are necessary. Thus, conservatives and reformists should be allowed to dispute. This disagreement and dispute between yesterday and today will result in a more productive tomorrow.