Deus sive Natura —The Metamorphoses of a Dictum from Maimonides to Spinoza Idel, Moshe. “Deus sive Natura —The Metamorphoses of a Dictum from Maimonides to Spinoza.” Maimonides and the Sciences. ed. Robert S. Cohen and Hillel Levine: 87-110.on The Guide of the Perplexed