I have 'mixed emotions' [='mixed feelings'] about doing this. [=I'm not sure if I want to do this or not]
He's always found it hard to express (his) 'emotions'. [=to show his feelings]
The defendant showed/displayed no 'emotion' when the verdict was read.
(..) The other kids were into Nintendo. Are you ever afraid? No. Not even of dying? No. You don't feel any emotion about it one way or another? No. I have to stay functional until the mission is complete. Then it doesn't matter. (..)1991 Terminator 2: Judgment Day