Criseyde is eventually worn down and she and Troilus become lover, but almost immediately she is sent over to the Greeks in an exchange of prisoners, when her father asks for her to be returned to him. She promises Troilus that she will come back, this becomes impossible for her
Love on earth
It comes in a thousand forms.
A bull rises out of the sea.
A swan plunges. A gold rain falls.
Or a noble heart perceives in itself
What else is life?
from A Double Sorrow: Troilus and Criseyde Book I (Faber, 2014), ? Lavinia Greenlaw 2014, used by permission of the author and the publisher