“Roget's Thesaurus is an oddball philosophy of language masquerading as a reference book.”
"When you go to the library, the books are not arranged in alphabetical order — they’re organized topically. In order to find a book in my local library, you have to look up the book in the catalog, note the Dewey Decimal Number, then find it on the shelf. The beauty of this system, and a major argument for physical browsing collections, is that when you find the book on the shelf, it will be surrounded by books on the similar subject. You may go looking for one particular book and while browsing you might find a better book or the book you didn’t even know you were looking for. This is the way a thesaurus is supposed to work." - Austin Kleon
Article: A Library of Words