The Influence of R' Saadia Gaon on the Rambam and all the other Medieval Jewish Philosophers

Many of the ideas in the מוֹרֵה נְבוֹכִים, הַכּוּזָרִי, הַחוֹבוֹת הַלְּבָבוֹת, יַד רמ"ה, הָעִקָּרִים, וְכוּלְהוּ actually were already written in the אֱמוּנוֹת וְדֵעוֹת