Mahdism is the crystallization of a natural inspiration through which people look to the awaited day. Mahdi (a.s.) is not only a thought to await its birth; it is not a predication to be optimistic for its coming true; rather it is an external and alert reality which we are waiting to see it go into action. Awaiting has many components and constituents which are clearly recorded and embedded in Shi'ah's scientific sources and codes of practice including the following: negating the existing situation (corruption, oppression, injustice and destruction), rejecting oppressive political governments (by considering them illegitimate), seeking reform and making efforts for a better life (evolvement), endeavoring to achieve progress and advancement, continuous and active uprising and movement, establishing legitimate governments and not reconciling with the unjust, oppressive and corrupt ones.