that willing suspension of disbelief for the moment, which constitutes poetic faith - Samuel Taylor Coleridge

So twice five miles of fertile ground With walls and towers were girdled round: And there were gardens bright with sinuous rills, Where blossomed many an incense-bearing tree; And here were forests ancient as the hills, Enfolding sunny spots of greenery.

What is there in thee, Man, that can be known?
Dark fluxion, all unfixable by thought,
A phantom dim of past and future wrought,
Vain sister of the worm ...

And now this spell was snapt: once more
I viewed the ocean green,
And look'd far forth, yet little saw
Of what had else been seen -

Like one that on a lonesome road
Doth walk in fear and dread,
And having once turn'd round, walks on
And turns no more his head;
Because he knows a frightful fiend
Doth close behind him tread.