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Spiritual_Roadmap_by_Ghazali, page : 30
After these reflections I knew that whatever I do not know in this fashion and with this mode of
certainty is
not reliable and infallible knowledge; and knowledge that is not infallible is not certain
knowledge.
1) The Approach of Sophists and Rejecting Knowledge
Thereupon I investigated the various kinds of knowledge I had, and found myself
destitute of all
knowledge with this characteristic of infallibility, except in the case of sensible knowledge [the
five senses]
and the obvious. So I said, “Now that despair has come over me, there is no point
in addressing any
problems except on the basis of what is self-evident, namely the sensible knowledge and the
obvious. So I
must perfect this first in order that I become certain regarding sensible knowledge,
same kind as my
previous trust in the beliefs I had merely taken over from others and as the trust most men have
certainty is
not reliable and infallible knowledge; and knowledge that is not infallible is not certain
knowledge.
1) The Approach of Sophists and Rejecting Knowledge
Thereupon I investigated the various kinds of knowledge I had, and found myself
destitute of all
knowledge with this characteristic of infallibility, except in the case of sensible knowledge [the
five senses]
and the obvious. So I said, “Now that despair has come over me, there is no point
in addressing any
problems except on the basis of what is self-evident, namely the sensible knowledge and the
obvious. So I
must perfect this first in order that I become certain regarding sensible knowledge,
same kind as my
previous trust in the beliefs I had merely taken over from others and as the trust most men have