Poet, philosopher, and sensitive misanthrope, a spectacular fly in the ointment of the refined eleventh-century Andalusian-Jewish elite, Solomon Ibn Gabirol comes down to us as one of the most complicated intellectual figures in the history of post-biblical Judaism. Unlike his worldly predecessor Shmuel HaNagid, the first important poet of the period, Ibn Gabirol was a reclusive, mystically inclined figure whose modern-sounding medieval poems range from sublime descriptions of the heavenly spheres to poisonous jabs at court life and its pretenders. His verse, which demonstrates complete...