If the History of Philosophy admitted of no other mode of treatment than either the simply learned, which regards all systems as equally true, as being alike mere opinions; or the skeptical, which sees equal error in all; or lastly, the eclectic, which discovers fragments of the truth in all, we should have to agree that those are right who, in the interests of philosophy, warn all, or at least beginners, against studying its history. But whether a better method ...