Philosophy has been called the search for the Permanent amid the changing. With this account of philosophy there is no need to quarrel. But having accepted it, a distinction remains to be observed, a distinction of capital importance, which we are in constant danger of forgetting. It is one thing to find the Permanent; it is another thing to find a form of words in which the Permanent shall stand permanently expressed. It is one thing to experience something fixed and changeless; it is another thing to fix this something by a changeless definition. The first may be possible, while the second remains impossible for ever.

The Usurpation Of Language (1910)