Damon: (referring to Stefan) There was a time that I trusted him more than anyone.
Elena: Trust breeds trust. You have to give it to get it.
Damon: Are you lecturing me?
Elena: Do you need to be lectured?
Damon: (referring to Katherine) I just want her back. I'm sure you can understand that.
Elena: I can understand that you would do anything for her, yes.
Damon: Then you understand what I will do if anyone gets in my way.