O truant Muse, what shall be thy amends
For thy neglect of truth in beauty dyed?
Both truth and beauty on my love depends;
So dost thou too, and therein dignified.
Make answer, Muse: wilt thou not haply say
'Truth needs no colour, with his colour fix'd;
Beauty no pencil, beauty's truth to lay;
But best is best, if never intermix'd?'
Because he needs no praise, wilt thou be dumb?
Excuse not silence so; for't lies in thee
To make him much outlive a gilded tomb,
And to be praised of ages yet to be.
Then do thy office, Muse; I teach thee how
To make him seem long hence as he shows now.
William Shakespeare
http://www.poemhunter.com/poem/sonnet-ci/