sentences:  He began studying philosophy with his father when he was thirteen and then studied with Moses and Abraham Caslari.He studied medicine and eventually became a successful physician, and was well versed in Biblical and rabbinical literature.Eventually he traveled to the Crown of Aragon, where he is known to have lived and studied in Cervera (1348-1349), Barcelona and Valencia, and later in Toledo, Burgos and Soria (1358-1362), in the Kingdom of Castile.