Edna St. Vincent Millay

Sonnet 10

Oh, think not I am faithful to a vow!  
Faithless am I save to love's self alone.  
Were you not lovely I would leave you now:  
After the feet of beauty fly my own.   
Were you not still my hunger's rarest food,  
And water ever to my wildest thirst,  
I would desert you - think not but I would! -  
And seek another as I sought you first.   
But you are mobile as the veering air,  
And all your charms more changeful than the tide,  
Wherefore to be inconstant is no care:  
I have but to continue at your side.  
So wanton, light and false, my love, are you,  
I am most faithless when I most am true.