يظن الغمر أن الكتب تهدى ... ... أخاً فهم لإدراك العلوموما يد... - أبو حيان التوحيدي

"Inexperience people think that books will lead the one of intellect to understanding. But the ignoramus doesn't know that in these books are ambiguos that will confuse even the most intelligent of people. If you try to learn this knowledge without a teacher you will go astray and affairs will become so confusing to you that you will be more astray than Toma*, the physician.*توما الحكيم"