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These three, the minerals, plants, and animals, having no Reason, know God by a natural 'unveiling' or immediate evidential knowledge. Man, on the contrary, possesses Reason, and the Reason develops his ego to a full extent, and he becomes veiled by his own ego.
'Thus from the viewpoint of the ideal state of 'servant-ness', Man is situated on the lowest level on the scale of Being. In order to climb to scale upward, he must first of all dispel from himself Reason - which is, paradoxically, exactly the thing that makes him a Man - and bring to naught al the properties that derive from Reason. Only when he succeeds in doing so, does he ascend to the rank of animals. He must then go on to ascent to the rank of plants, and thence finally to the rank of minerals. Then only does he find himself in the highest position on the whole scale of Being. There will no longer remain in him even a shadow of Reason, and the Light of the Absolute will illumine him undimmed, unhindered, in its original splendor.'
These considerations make us aware of the fact that Man as an Idea is per se 'perfect' and occupies the highest position, but that in his actual situation he is far from being a perfect realization of his own ideal. We can maintain that Man is the highest being in the world only when we take the viewpoint of a philosophical anthropology standing on the supposition that the ideal of Man is perfectly realized in the actual Man. The actual Man, however, is a being in full possession of Reason, a being dependent upon his Reason and brandishing it everywhere in his understanding of everything. He who brandishes his Reason is not capable of penetrating the mystery of Being.
But while making this observation, we realize that we are already far removed from the sphere in which we began our discussion of Man. We started from the basic assumption that Man can be considered on two entirely different levels: cosmic and individual. And the purpose of the present chapter has been to elucidate the concept of Man on the cosmic level, as Microcosm. And on this level, Man is certainly the highest of all beings. However, in the last section of this chapter, we have been moving down to the concept of Man on the individual level. We have learnt that on this latter level, Man is, in a certain sense, even lower than animals, plants and minerals. On this level, not all men, but only a small number of special men are worthy to be called 'perfect men'. They are 'perfect' because, having already died to their own ego through the mystical experience of self-annihilation and subsistence, they are no longer veiled by Reason.
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Toshihiko Izutsu (Sufism and Taoism: A Comparative Study of Key Philosophical Concepts)