This text was written there was more than 10 centuries! by Ghazali (Sufi Muslim jurist and philosopher). The art of arguing, structuring reasoning ... is of superior quality. One goal is God and we can reach it with only our senses that capture what is material or is it a light ...? The starting point is the explanation of a verse from the Koran (Sufi tradition), but the content is to be recommended at any absolute researcher. + Subject although introduced by Roger Deladrière