He was educated there and at Madrid University, where his Radicalism soon got him into trouble, and he narrowly escaped being expelled for his share in student riots and other demonstrations against the governments of Queen Isabella.
In earlier life he had been a zealous student of Kant and Hegel, and to the end he never ceased to cultivate the philosophic spirit; but he had little confidence in metaphysical systems, and sought rather to translate philosophy into the wisdom of life.
Mendelssohn soon won the confidence of Bernhard, who made the young student successively his book-keeper and his partner.
The reader to whom the study is new will gain some idea of the bulk of the extant patristic literature, if we add that in Migne's collection ninety-six large volumes are occupied with the Greek fathers from Clement of Rome to John of Damascus, and seventysix with the Latin fathers from Tertullian to Gregory the Great.2 For a discussion of the more important fathers the student is referred to the articles which deal with them separately.
About 1685) wrote the historical work Qore ha-doroth (Venice, 1746), using Jewish and other sources; Jacob ben Hayyim Zemah, kabbalist and student of Luria, wrote Qol be-ramah, a commentary on the Zohar and on the liturgy; Abraham Hayekini, kabbalist, chiefly remembered as a supporter of the would-be Messiah, Shabbethai Zebhi, wrote Hod Malkuth (Constantinople, 1655) and sermons.