How about...
"Let me not to the marriage of true minds
Admit impediments. Love is not love
Which alters when it alteration finds,
Or bends with the remover to remove:
O no! it is an ever-fixed mark
That looks on tempests and is never shaken;
It is the star to every wandering bark,
Whose worth's unknown, although his height be taken.
Love's not Time's fool, though rosy lips and cheeks
Within his bending sickle's compass come:
Love alters not with his brief hours and weeks,
But bears it out even to the edge of doom.
If this be error and upon me proved,
I never writ, nor no man ever loved."
Or, perhaps...
"But love, first learned in a lady's eyes,
Lives not alone immured in the brain;
But, with the motion of all elements,
Courses as swift as thought in every power,
And gives to every power a double power,
Above their functions and their offices.
It adds a precious seeing to the eye;
A lover's eyes will gaze an eagle blind;
A lover's ear will hear the lowest sound,
When the suspicious head of theft is stopp'd:
Love's feeling is more soft and sensible
Than are the tender horns of cockl'd snails;
Love's tongue proves dainty Bacchus gross in taste:
For valour, is not Love a Hercules,
Still climbing trees in the Hesperides?
Subtle as Sphinx; as sweet and musical
As bright Apollo's lute, strung with his hair:
And when Love speaks, the voice of all the gods
Makes heaven drowsy with the harmony.
Never durst poet touch a pen to write
Until his ink were temper'd with Love's sighs;
O, then his lines would ravish savage ears
And plant in tyrants mild humility.
From women's eyes this doctrine I derive:
They sparkle still the right Promethean fire;
They are the books, the arts, the academes,
That show, contain and nourish all the world:
Else none at all in ought proves excellent."
