B155 Biography of Imam Sufyan ibn Uyaynah

He was a mujaddid who combined knowledge of fiqh with knowledge of hadith. He knew about hadith and their degrees of soundness. He had memorized many volumes of ahadith; he knew all about their narrators and the correct pronunciation of their names. Texts would be proofread and corrected with his help, even though he was blind. He was an ocean of knowledge, conversant with the opinions of different scholars and never at odds with any of them.