Analysis of Sister to Sister

'When I received that love which is a face,
When I perceived that face which is a love,
Two voices, like those two old nations, strove
Within my heart, and the first-born gave place
And served the younger. 'Ah this golden space
Doth cage the airy pinions of my dove!
And ah this value, which might prove and more
Another love, seems simony to the grace
Of ours!' Thus while one passion doth protest,
The other cries: 'I care not how it be!
For, givest thou much or little, worst or best,
Nor am I richer nor thou dispossest;
My fond subtraction is still thine in me,
And all thy dear remainder mine in thee!''