Galadriel’s mirror

[MLD-Grounds-Keeper-Willie]

Well, here's my opinion, if my first wasn't clear enough. It can display your greatest desires, but that's only if that's what you want to see when you look in the mirror. It can tell your future, but that doesn't necessarily mean it's going to happen, and that's only if you leave it to show yu hwat it will. It can show you something that will happen 20 years from now, but you are still in the present, which means that depending on what you do from the present to 20 years from now, it might come true or be changed completely or to a degree. As for feelings, I think that what you see in the mirror, if you let it show you what it will, might be (and probably most likely) reflecting some of your feelings, which I think Davem basically said.