Oliver Goldsmith - Memory

O MEMORY, thou fond deceiver,
Still importunate and vain,
To former joys recurring ever,
And turning all the past to pain:

Thou, like the world, th' oppress'd oppressing,
Thy smiles increase the wretch's woe:
And he who wants each other blessing
In thee must ever find a foe.

Oliver Goldsmith

http://www.poemhunter.com/poem/memory-5/