green thought in a green shade

Meanwhile the mind, from pleasure less,
Withdraws into its happiness;
The mind, that ocean where each kind
Does straight its own resemblance find,
Yet it creates, transcending these,
Far other worlds, and other seas; 
  Yet it creates, transcending these,
 
To a green thought in a green shade.
Annihilating all that's made.
Green shade - all that's made.
 
Here at the fountain's sliding foot,
Or at some fruit tree's mossy root,
Casting the body's vest aside,
My soul into the boughs does glide;  
There like a bird it sits and sings,
Then whets, and combs its silver wings;
There like a bird it sits and sings,
 
To a green thought in a green shade.
Annihilating all that's made
Green shade- all that's made...