This Hadith has already been mentioned in full. See the Commentary on Hadith No. 247. A part of it which relates to the eminence of knowledge has been reproduced here. In this Hadith, knowledge means the knowledge of the religion, that is to say the correct knowledge of the Qur'an and Hadith which is acquired without any prejudice of any juristic school. Otherwise juristic prejudice can turn knowledge into great obstruction. May Allah bestow His Mercy on us.