Reality exists in the human mind, and nowhere else

We discussed this for a short time in class, but I found it really interesting and didn't get to speak up.
"Reality exists in the human mind, and nowhere else." Everyone has their own reality. Everyone. What is real or true in my mind, isn't in someone else's. Two people could be having the exact same problem, but they're going through it completely different because of how they're looking at the situation. It's all about perspective. How we look at things. When people say "No one will ever understand." They're right! No one's ever going to see it or take it in like you do. No one feels it like you do. But I think that what we have to work on is accepting that. Well at least I know I do.