Sa’adia Gaon: Jews and Jewish Philosophy in the Islamic Context Yemenite Jew (National Geographic 1914) Source: Wikimedia Commons. Sa’adia Gaon was an important Jewish philosopher and communal leader of the 9th and 10th centuries, famous in particular for his massive Book of Beliefs and Opinions. A child prodigy to rose to the highest ranks of Jewish scholarship, his thought left an indelible imprint on the Jewish spiritual tradition. Share this:TwitterTumblrFacebookLinkedInEmailRedditLike this:Like Loading...