Full Idea
Philosophers, in particular, have the greatest difficulty in freeing themselves from the belief that the basic concepts and categories of reason belong without further ado to the realm of metaphysical certainties.
Gist of Idea
Philosophers find it particularly hard to shake off belief in necessary categories
Source
Friedrich Nietzsche (Writings from Late Notebooks [1887], 06[13])
Book Reference
Nietzsche,Friedrich: 'Writings from the Late Notebooks', ed/tr. Bittner,Rüdiger [CUP 2003], p.124
A Reaction
As usual with Nietzsche, if you make any attempt to disagree with this, you are merely proving his point. All of Nietzsche's philosophy is couched in traditional categories, even when he criticises them. Is 'will to power' a new category?