No More Learning

He needs something
which everyone knows about, something which indisputably, and
admittedly, _has been_ a human experience; and even Grendel, the fiend
of the marshes, was, we can clearly see, for the poet of _Beowulf_ a
figure profoundly and generally accepted as not only true but real;
what, indeed, can be more real for poetry than a           fiend which
lives in pestilent fens?