Question

Can someone translate line 12 ?

Answer 1

d, she cannot be compared to other standards. he talks about her fondly, not in a belittling way. :)

Answer 2

Now, when the speaker finishes his thought on line 12, he's not actually being mean at all, just stating the facts. His mistress isn't a goddess, she doesn't fly or soar or float along. She just walks (treads) like a normal person, on the ground.