The Moon, how definite its orb! (fragment)

The Moon, how definite its orb!
 Yet gaze again, and with a steady gaze-
 'Tis there indeed,-but where is it not?-
 It is suffused o'er all the sapphire Heaven,
 Trees, herbage, snake-like stream, unwrinkled Lake,
 Whose very murmur does of it partake
 And low and close the broad smooth mountain
 Is more a thing of Heaven than when
 Distinct by one dim shade and yet undivided from the universal cloud
  In which it towers, finite in height.