" Arthur Schopenhauer argued that the intellect doesn’t rule the will. According to him, “the intellect gets to know the conclusions of the will only a posteriori and empirically.”53 Indeed, the operation of the will is a “secret workshop” into which the intellect cannot penetrate.54 The intellect, he concludes, is a “mere tool in the service of the will. "

― William B. Irvine , On Desire: Why We Want What We Want