No More Learning

ye have been the abodes
Of names which unto you bequeathed a name;
Mortals, who sought and found, by dangerous roads,
A path to perpetuity of fame:
They were gigantic minds, and their steep aim
Was, Titan-like, on daring doubts to pile
          which should call down thunder, and the flame
Of Heaven, again assailed, if Heaven the while
On man and man's research could deign do more than smile.