Speaking of the truth is tantamount to speaking of existence and essence, it commences with God and shines through his creation, it looms large in human duty and speech. While human speech and action are quite limited, but Ali radiates light who is an emblem of the truth. He lived his life for the manifestation of truth. Truth shines through in his sayings: utter significance of the truth, the features of those advocating truth, divine rights and popular rights, people's rights and those of the poor, to compensate injustice, the necessity of standing up for the truth, the truth lovers, opposing truth and its consequences, duties of the rulers and their deputies towards truth, and finally asking the Lord for the implementation of the truth.