Reason cannot conceive God - Allah
Reason cannot understand God, because:
"He has no intelligeable representation and
the intelligences don't show the way towards him".
laisa lahu mathala ma`qûl
wa lâ dallat `aleihi-l `uqûl
instead:
kâna wa lâ makân
wa huwa `ala mâ `aleihi kân
"He was when there was no place,
and He is now such as He has always been." TD-163/4
http://www.livingislam.org/n/bge_e.html#ch10
-> 10.4.1