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  • SpiritualRoadmapbyGhazali, page : 102

eye endowed with light such that in that light the unseen and other supra-
intellectual objects become visible.

Doubt about prophetic revelation is either (a) doubt of its possibility in general,
or (b) doubt of its actual occurrence, or (c) doubt of the attainment of it by a
specific individual.

The proof of the possibility of there being prophecy and the proof that there has
been prophecy is that there is knowledge in the world the attainment of which by
reason is inconceivable; for example, in medical science and astronomy.
Whoever researches in such matters⁻knows of necessity that this knowledge is
attained only by Divine inspiration and by assistance from Allah most high. It
cannot be reached by observation. For instance there are some astronomical
laws based on phenomena which occur only once in a thousand years; how can
these be arrived at by personal observation? It is the same with the properties of
drugs.