Sarah Edwards dark but lovely

I can't understand, this work of grace
How a perfect God would come and take my place
The stars they don't move You
The waves can't undo You
The mountains in their splendor
They cannot steal Your heart
This God who is holy, perfect in beauty
Awesome in glory is ravished by my heart
Though I'm poor, You say I am lovely
Though I'm dark, You say I'm beautiful
Somehow my weak glance has overwhelmed You
And somehow my weak love has stolen away Your heart