Impossible to categorize ...

... The University Bookman: The Private World of Unamuno. (Hat tip, Dave Lull.)

In an essay on Unamuno published in Buenos Aires in 1923, Jorge Luis Borges pointed out that Unamuno affirmed concepts by asserting that they can not be negated if they were capable of being once, ever, so much as asserted at all. In the same way, Unamuno could not conceive how any soul, any spirit, once asserted by its being brought into being, could ever be denied, could forever be denied—by death.