• Monotheistic religions in the West have tended to conflate having a general orientation in life, having a specific theory of the world, having a sense of the positive meaningfulness of one's existence, and having a fixed set of rules for behavior, but these elements are in principle separable. ... The "metaphysical need," ... both Marx and Nietzsche held, is a historical phenomenon that arises under determinate circumstances, and could be expected to disappear under other circumstances that we could relatively easily envisage.

    Raymond Geuss: Monotheistic religions in the West have tended to conflate having a general orientation in life, having a specific theory of the world, having a sense of the positive meaningfulness of one's existence, and having a fixed set of rules for behavior, but these elements are in principle separable. ... The "metaphysical need," ... both Marx and Nietzsche held, is a historical phenomenon that arises under determinate circumstances, and could be expected to disappear under other circumstances that we could relatively easily envisage.
    "Philosophy and Real Politics". Book by Raymond Geuss, 2008.