Full Idea
Metaphysical reasonings, such as they have hitherto been, have been simple enough for the most part. It is the metaphysical concepts which it is difficult to apprehend.
Gist of Idea
Metaphysical reasoning is simple enough, but the concepts are very hard
Source
Charles Sanders Peirce (Reasoning and the Logic of Things [1898], I)
Book Reference
Peirce,Charles Sanders: 'Reasoning and the Logic of Things', ed/tr. Ketner,K.L. [Harvard 1992], p.109
A Reaction
Peirce is not, of course, saying that it is just conceptual, because for him science comes first. It is the woolly concepts that alienate some people from metaphysics. Metaphysicians should challenge the concepts they use much, much more!