According to Shia belief, this idea of a religious mediator includes the Imams. Al-Shaykh al-Saduq has recorded a tradition that the prophet told Ali: "There are three things that I swear to be true. The first is that you and your descendants are mediators for mankind, as they will not be able to know Allah except through your introduction. The second is that you are to present to Allah those who may enter Paradise, i.e. those who recognize you and those whom you recognize. The third is that you are the absolute mediators, for those who will go to Hell will only be those who do not recognize you and whom you do not recognize." Al-Baqir said, "through us God is known and is worshiped by human kind...whoever calls Allah through our mediation is blessed". Without Imam, theophanic form (mazhar) and Face of Allah, no one can know Allah because through him, Allah manifests himself. Mulla Sadra explains that as the Imam is the perfect man—insan al-Kamel—is a higher-degree creature and the existence of the lower depends upon the higher degree, so the existence of the Imam is necessary. Wali Shia believe that the Divine Truth or the True Religion has two aspects: exoteric (zahir) and esoteric (batin). The exoteric side is revealed by the prophet and his Holy Book to the general people but the esoteric side is the mission of Imams and for the believers by the Esoteric interpretation of the Quran(Ta'wil). As the exoteric speaks of Shariah and esoteric speaks of Haqiqah, it is not a matter of succession but a matter of simultaneity. Haqiqah is based on the spiritual meaning of Quran. The kinship between the prophet and Imams is the sign of their walayah, not the basis for their walayah. According to Shia just those are the real faithful that "Allah has written faith upon their hearts" (58:22): only if Walayah is obtained the faith is perfect. Shia theologians refer to the verse 5:55 as a proof for the Walayah of Imams. According to Motahhari, Walayah has four dimensions: the right of love, loving the Ahl al-Bayt is obligatory for all Muslims, the authority of Alh al-Bayt in spiritual guidance, the authority of Ahl al-Bayt in socio-political guidance and the authority of the universal nature by the grace of Allah. By Shia, in fact, a guardian must protect the religion against any additions or subtractions