In his treatise on the Laws, he divides them into what he looks upon as unwritten laws, that is to say, the living patterns of a blameless life which the scripture sets before us in Enoch, Noah, Abraham, etc., and particular laws in the narrower technical common acceptation of the word.

In the other treatises, he deduces an allegorical meaning from the plain historical account of Moses, which serves him as the foundation for his philosophical system.

In all these works he exhibits profound and varied learning, showing himself deeply versed in Greek literature of every age and description, and of considerable skill in the sciences of music, geometry, and astronomy. His style is clear, and even though he may at times be open to the charge of an over-refined subtilty, it is impossible to deny him the praise of acuteness and ingenuity, set off to their best advantage by neatness of language and felicity of expression.