Hadeeth of Ali (radiAllaahu 'anhu)

And from this understanding, is what Abu Nu’aym and others have reported from Kumail Ibn Ziyaad 31 on the authority of ‘Ali, radiAllaahu ‘anhu, that he said:

“The people are of three types: the learned scholar, the student of knowledge who is upon the path towards salvation and the uncivilized ignorant follower following every ideology, blowing in the direction of every wind. He is not guided by the light of knowledge nor is he established upon a firm pillar.”

Then he mentioned some words on the benefit of knowledge, up to the point where he said:

“Here! Indeed, here is immense knowledge – and he pointed to his chest – if only I could gather those who would carry it!..."

- Al-Haafidh Ibn Rajab Al-Hanbalee