He is considered by Jewish scholars to be one of the most distinguished of the Biblical exegetes of Spain. He was a pupil of Rabbi Shlomo ben Aderet (the Rashba). Unlike the latter, Bahya did not devote his attention to Talmudic science, but to Biblical exegesis, taking for his model Moses ben Nahman who is known as Nahmanides, the teacher of Solomon ben Adret, who was the first to make use of the Kabbalah as a means of interpreting the Torah. He discharged with zeal the duties of a darshan ("preacher") in Saragossa, sharing this position with several others, and on this account received a small salary, which was scarcely enough to support him and his family; but neither his struggle for daily bread nor the reverses that he suffered (to which he referred in the introduction to his commentary on the Torah) diminished his interest in Torah study in general, and in Biblical exegesis in particular.
He enumerates the following four methods, all of which in his opinion are indispensable to the exegete:
Generally speaking Bahye does not reveal any of his Kabbalistic sources, other than generally referring to Sefer ha-Bahir and the works of Nahmanides. He only mentions the Zohar twice.
Bahye's commentary is considered to derive a particular charm from its form. Each parashah, or weekly lesson, is prefaced by an introduction preparing the reader for the fundamental ideas to be discussed; and this introduction bears a motto in the form of some verse selected from the Book of Proverbs. Furthermore, by the questions that are frequently raised the reader is compelled to take part in the author's mental processes; the danger of monotony being also thereby removed.
The commentary was first printed at Naples in 1492; and the favor which it enjoyed is attested by the numerous supercommentaries published on it. Owing to the large space devoted to the Kabbalah, the work was particularly valuable to Kabbalists, although Bahye also availed himself of non-Jewish sources. Later editions of the commentary appeared at Pesaro, 1507, 1514, and 1517; Constantinople, 1517; Rimini, 1524; Venice, 1544, 1546, 1559, 1566, and later. Not less than ten supercommentaries are enumerated by Bernstein (Monatsschrift xviii. 194-196), which give further evidence of the popularity of the work.
Another work of Bahye, also published frequently, and in the first Mantua edition of 1514 erroneously ascribed to Moses ben Nahman, bears the title of Shulkhan Arba ("Table [of] Four"). It consists of four chapters, the first three of which contain religious rules of conduct regarding the various meals, while the fourth chapter treats of the banquet of the righteous in the world to come.
A work might have been written by Bahye under the title of Hoshen ha-Mishpat ("Breastplate of Judgment".) Reference to this work is made only once by him, and it is unknown if this work was actually written or not.
One book ostensibly written by Bahye, edited by M. Homburg under the title of Soba Semakhot ("Fulness of Joy"), as being a commentary on the Book of Job, is actually a compilation made by a later editor from two of Bahye's actual works, Kad ha-Kemah (Constantinople, 1515) and Shulhan shel Arba (Mantua, 1514).