Every mental pursuit takes its reality and worth from the ardour of the pursuer. - John Keats

Fade far away, dissolve, and quite forget
What thou among the leaves hast never known,
The weariness, the fever, and the fret
Here, where men sit and hear each other groan;
Where palsy shakes a few, sad, last gray hairs,
Where youth grows pale, and spectre-thin, and dies;
Where but to think is to be full of sorrow
And leaden-eyed despairs.

As though a rose should shut and be a bud again.

At once it struck me what quality went to form a man of achievement, especially in literature, and which Shakespeare possessed so enormously — I mean negative capability, that is, when a man is capable of being in uncertainties, mysteries, doubts, without any irritable reaching after fact and reason.