"Metaphysics means nothing but an unusually obstinate effort to think clearly"

This quote by William James is a humorous way of explaining the problem of metaphysics. Metaphysics is a branch of viewpoint that handles the nature of truth and the fundamental concerns of existence. It is an abstract and complicated field of study that requires a lot of idea and effort to comprehend. James is recommending that metaphysics is a specifically challenging topic to comprehend, and that it requires an unusually persistent and determined mindset to believe plainly about it. He implies that it is not an easy job to understand the abstract principles and ideas of metaphysics, which it needs a great deal of effort and commitment to make development in this field. In this way, James is highlighting the trouble of metaphysics, however likewise highlighting the importance of determination and decision in order to make progress.