Brooks of Arnon. Tributaries of the Arnon River in Jordan, where Milton struggles with the satanic spirit of reason, Urizen. These are biblical places where Jacob wrestled with God to gain a blessing for Israel, where the Jews escaped from bondage in Egypt, and where Moses was buried. Thus, symbolically, Blake connects his myth with the religious journey of God’s chosen people into liberty, nationhood, and deliverance from the tyranny of law. Urizen baptizes Milton with the icy river water (religious dogma). Milton uses the living red clay to make a human form for Urizen. Thus their struggle ends in a victory of imagination over reason.