יסוד מורא וסוד תורה: ר' אברהם אבן עזרא ; מהדורה מדעית מבוארת

"'Yisod Morah VeSod Torah' by Ibn Ezra, is devoted entirely to one topic - understanding the mitzvot, a key examination of the foundations of faith and the inner essence of the Torah. This issue will be examined from two points of view, which complement each other: a sharp criticism of the accepted number of mitzvot, and a consistent intellectual clarification of the mitzvot's tastes and their purposes. The touch of 'Yisod Morah VeSod Torah' to the interpretation of the Bible is direct and clear. Not only are all his claims based on the scriptures as they are, and therefore they have some contribution to their understanding, but the very systematic discussion of the meaning and purpose of the Torah commandments complements and expands what Raba'a wrote about them in his commentaries on the Torah. "A and scholars of his doctrine, a tested and reliable version of the book, which is accompanied by a mechanism for exchanging versions and a detailed explanation that clarifies what the author is saying, clarifying his sources and demonstrating his words in his overall doctrine. This is a revised third edition that includes many hundreds of additions and corrections as well as an 'afterword', written by Prof. Uriel Simon, which deals with the polemical aspect of the book - the necessary contribution of Ba'al Pesht Ha'kam to a complete understanding of Halacha." -- from the back cover.