You don't have to know how, but I expect you to try. Do you honestly think I would ever allow anything to happen to you? To allow anyone to hurt you? Klaus is extending an olive branch to you, and you know as well as I do, that as far as my brother goes, that's a good a gesture as you are going to get. Please Katerina for me, please at least try. Hell, talk to them about the weather. Ask Rebekah about shoes. It may take 50 years or 100 years for them to stop hating you, but it won't happen ever if you don't TRY.
Where is the girl who so bravely contacted me regarding the cure? You met me in that hotel bar and you looked me dead in the eyes without flinching, without trying to hide. Oh you wanted something, certainly. Your freedom from Klaus, a pardon. But you could not be sure I wouldn't kill you? After all, you convinced Damon Salvatore to dagger me to free yourself from my compulsion, you eluded capture for 500 years, I had every right, but you faced me. I only ask that you do the same for him.
The thing is, Katerina, you don't need to choose survival here--back home, yes, but look where it got you if what Damon is saying is true. Trust in me to keep you safe and try for my sake with my family, with my brothers and sisters.