Shaykh Saduq says: “I was told by Muhammad ibn Ali Majilway (RA)” He Muhammad said: “I was told by Muhammad ibn Yahya Al Attar on the authority of Ahmen ibn Muhammad, on the authority of Abbas ibn Ma’ruf, on the authority of Ali ibn Mahziyar, on the authority of Hakam ibn Bahlul, on the authority of Isma’eel ibn Hamam, on the authority of Umar ibn Uzaynah, on the authority of Sulaym ibn Qays Hilali.”
He (Sulaym) said: “I head Ali (AS) saying to Abul Tufayl Amir ibn Wassila Al-Kanani:
“O Abu Tufayl, knowledge are two knowledges. One knowledge is that in which people do not have a choice but to look at it and this is the Sign of Allah. The other knowledge is one that people can avoid looking into, and that is the Nature of Allah.”