A thing of beauty is a joy for ever:  
Its lovliness increases; it will never  
Pass into nothingness; but still will keep  
A bower quiet for us, and a sleep  
Full of sweet dreams, and health, and quiet breathing.  
Therefore, on every morrow, are we wreathing  
A flowery band to bind us to the earth,  
Spite of despondence, of the inhuman dearth  
Of noble natures, of the gloomy days,  
Of all the unhealthy and o'er-darkn'd ways  
Made for our searching: yes, in spite of all,  
Some shape of beauty moves away the pall  
From our dark spirits. Such the sun, the moon,  
Trees old and young, sprouting a shady boon  
For simple sheep; and such are daffodils  
With the green world they live in; and clear rills  
That for themselves a cooling covert make  
'Gainst the hot season; the mid-forest brake,  
Rich with a sprinkling of fair musk-rose blooms:  
And such too is the grandeur of the dooms  
We have imagined for the mighty dead;  
An endless fountain of immortal drink,  
Pouring unto us from the heaven's brink.
John Keats
http://www.poemhunter.com/poem/a-thing-of-beauty-endymion/