Theologians and philosophers have responded in various ways to the place of faith and reason in determining the truth of metaphysical ideas, morality, and religious beliefs. A fideist is one who argues for fideism. Historically, fideism is most commonly ascribed to four philosophers: Søren Kierkegaard, Blaise Pascal, William James, and Ludwig Wittgenstein; with fideism being a label applied in a negative sense by their opponents, but which is not always supported by their own ideas and works or followers. A qualified form of fideism is sometimes attributed to Immanuel Kant's famous suggestion that we must "deny knowledge in order to make room for faith".