The lines "For I cannot know your past / And of mine what can you know?" show the
speaker's...
Mistrust
Terror
Hesitancy
Unhappiness



Answer :

The lines show the a)mistrust.

Why?

The lines are indicating that someone’s past is unknown. In addition, it is also indicating that their own past is also unknown. Unknown is a synonym of mistrust. When you do not know something, you cannot trust it.