Sometimes we don't know what someone is really thinking or how much they're truly hurting. It's a very profound realization. Sometimes you don't know who has eaten that day, or who won't. Perhaps what they're going through while all along they're smiling and pretending their life is okay. If you just stop and try to think what the other person is feeling, it's possible we could all live peacefully. But it's truly a hard notion for people to comprehend.