  According to Bacon, the Book of God refers to his will, the Book of Nature to his works. He never gives a hint in his works that he has concealed any message of unbelief for the sophisticated reader; but he emphasized: (1) that religion and science should be kept separate and,  (2) that they were nevertheless complementary to each other. For Bacon, the attack of theologians on human curiosity cannot be founded on a rational basis. His statement that “all knowledge is to be limited by religion, and to be referred to use and action” (Bacon III [1887], 218)  does not express a general verdict on theoretical curiosity, but instead provides a normative framework for the tasks of science in a universal sense. Already in the dedicatory letter to James I in his Advancement of Learning, Bacon attacks “the zeal and jealousy of divines” (Bacon III,  264) and in his manuscript Filum Labyrinthi of 1607, he “thought  … how great opposition and prejudice natural philosophy had received by superstition, and the immoderate and blind zeal of religion” (Bacon VI [1863], 421). As Calvin had done long before him in the Institutes, Bacon stated that since God created the physical world, it was a legitimate object of man's knowledge, a conviction which he illustrated with the famous example of King Solomon in The Advancement of Learning (Zagorin 1999, 49–50; see also Kocher 1953, 27–8). Bacon praises Solomon's wisdom, which seems to be more like a game than an example of man's God-given thirst for knowledge: 