Robert Seymour Bridges - Melancholia

The sickness of desire, that in dark days
Looks on the imagination of despair,
Forgetteth man, and stinteth God his praise;
Nor but in sleep findeth a cure for care.
Incertainty that once gave scope to dream
Of laughing enterprise and glory untold,
Is now a blackness that no stars redeem,
A wall of terror in a night of cold.
Fool! thou that hast impossibly desired
And now impatiently despairest, see
How nought is changed: Joy's wisdom is attired
Splendid for others' eyes if not for thee:
Not love or beauty or youth from earth is fled:
If they delite thee not, 'tis thou art dead.

Robert Seymour Bridges

http://www.poemhunter.com/poem/melancholia-2/