Radak

David Kimchi (Radak) was a Provencal rabbi, biblical commentator, grammarian and philosopher, born to a family of grammarians and commentators. His father, R. Yosef Kimchi, wrote a popular polemic work defending Judaism against Christian attacks and his brother, Moshe, was a well-known commentator. Radak himself participated in a number of public religious disputations to defend Judaism. He also took part in the disputes surrounding Rambam's philosophical works. Influenced by Ibn Ezra and the Rambam in philosophical matters, he sided with those who supported the permissibility of philosophic study. Radak cautioned, however, that it should be undertaken only by those whose faith was well-grounded. His commentaries on Tanakh display his grammatical mastery, and are amongst the most basic and commonly referenced.