Sabzawari's new achievements in proving union of intellect with intelligible

Among Sabzawari’s philosophical achievements are his achievements related to proving the union of the intellect with the intelligible (the knower and the known). He has presented his own arguments to prove this theory. This article studies his arguments that are based on comparing mental being with external being, the changes that occur in the next world, the intelligibility of the immaterial beings, observing latitudinal intellects, deriving and the source of deriving, soul as the giver of perceptions and the unity between the ineligible’s being in itself and its being for its knower. Though these arguments cannot avoid certain objections such as being based on contradictory foundations, they pave the ground for a better understanding of the theory of the union of the knower with the known.