What does this line from the first stanza "That languish in resistless fire" mean?

The given line has been taken from the following stanza of the poem "A thousand martyrs" by Aphra Behn

"A thousand martyrs I have made,

All sacrificed to my desire;

A thousand beauties have betrayed,

That languish in resistless fire.

The untamed heart to hand I brought,

And fixed the wild and wandering thought."

The line "That languish in resistless fire" means that the beauties still burn with longing and desire for the speaker.