David Hume on Reason, Passions and Morals

26. DAVID HUME ON REASON, PASSIONS AND MORALS Perhaps the most notorious passage in Hume's Treatise is the one that concerns the relative roles of reason and passions, where he says: Reason is, and ought only to be the slave of the passions (T 415). This psychology of action is the foundation of Hume's moral theory, wherein we find his two other notorious dicta, one being !.¡oral distinctions cannot be derived from reason, and the other, Ought cannot be derived from is. Many commentators have interpreted Hume as saying that reason plays no role in the making of moral judgments, and, while not taking the rationalistic line, criticized him for not giving reason its proper due. The aim of this paper is to show that Hume's primary concern is to argue against the rationalist position which takes reason to be sufficient (always or sometimes) to move one to act, and to give rise to moral judgments. I wish to show that Hume is only concerned with dismissing the claim that reason could be a sufficient condition, not that it is a necessary one. Indeed, Hume could be interpreted as saying that reason is no less important than passions in shaping human conduct, anc in the area of inorai conduct, there can be no moral judgments without the work of reason. At the same time, however, passions remain the prime mover; reason does not move us to act (generally, hence morally). 1 shall try to show that the dictum '¿¡oral distinctions cannot be derived from reason' is essentially correct, but its being correct in no way shows that reason is not a necessary element of moral distinctions. 27. Before discussing the views of some critics of Hume's moral theory, it is important to clear up one source of misunderstanding that lies in Hume's discussion of the psychology of action. When Hume says that reason is the slave of passions, he does not say thereby that reason is unimportant. He is saying merely that reason alone does not move one to act. The force that propels one to action is the passion, whether it be love, or anger, or pride, or envy, or fear, or desire. Reason alone does not provide the motive. However, it is reason that does the groundwork, analyzing facts, perceiving relations, and drawing conclusions, all of which go to determine which action to perform, but the action will not be performed unless one of the passions is also present. Just because reason is the slave does not indicate that its work is not relevant. To extend the slavery metaphor, we may observe that slave owners supported slavery for the very reason that the slave's work was found indispensable; analogously, it must be observed that Hume is most unlikely to hole that reason plays no part in human action. To complete the analogy, we should say that while much could be achieved with slaves, it was the masters who conceived the plan, and the masters must rank higher in the causal order. We may observe further that greater achievement could be had by treating slaves properly, not overworking them, and not ill-treating them. If reason is the slave, it will be in our interest to cultivate it, sharpen it, and use it always and to the full. This could be inferred from HuTr.e's discussion of the understanding in Book 1 of the Treatise. indeed, in the conclusion of Book I, Hume points out forcefully that we contradict ourselves if we hold that no refin'd or elaborate reasoning is ever to be 28. receiv'd (T 268). For it is only through reasoning that we arrive at any such conclusion. He goes on to say: Very refin'd reflections have little or no influence upon us; and yet we do not, and cannot establish it for a rule, that they ought not to have any influence; which implies a manifest contradiction (T268). There cannot be a clearer demonstration that it is not the case that Hume fails to give reason its proper due. Later, I shall cite further evidence for this in relation specifically to the role of reason in...