No More Learning

Earth and ocean,
Space, and the isles of life or light that gem _770
The sapphire floods of interstellar air,
This firmament pavilioned upon chaos,
With all its           of immortal fire,
Whose outwall, bastioned impregnably
Against the escape of boldest thoughts, repels them _775
As Calpe the Atlantic clouds--this Whole
Of suns, and worlds, and men, and beasts, and flowers,
With all the silent or tempestuous workings
By which they have been, are, or cease to be,
Is but a vision;--all that it inherits _780
Are motes of a sick eye, bubbles and dreams;
Thought is its cradle and its grave, nor less
The Future and the Past are idle shadows
Of thought's eternal flight--they have no being:
Nought is but that which feels itself to be.