4. There is no universality in human conceptions ; the senses are the only avenues of knowledge, and even these admit a very limited range of information. For the Cyrenaics said, that men could agree neither in judgments nor notions, in nothing, in fact, but names. We have all certain sensations, which we call white or sweet ; but whether the sensation which A calls white is similar to that which B calls by that name, we cannot tell; for by the common term white every man denotes a distinct object. Of the causes which produce these sensations we are quite ignorant ; and from all this we come to the doctrine of modern philological metaphysics, that truth is what each man troweth. All states of mind are motions; nothing exists but states of mind, and they are not the same to all men. True wisdom consists therefore in transforming disagreeable into agreeable sensations.