If we lived accepting things as they are, we would not have the same problems we would when we see things as personal. The same events could happen again but they wouldn't affect us in the same way, because we would move with events, instead of being moved by events.
Heaven and hell are with us all the time and it is our outlook which makes us exist in one or the other, not how good or bad others think we are, but how we actually are, resenting things just because that is how they are is pointless as they aren't going to change just because we don't like them.
Fear also plays a big part in this resentful feeling, as fear of what could happen may cause us to do things which make it happen, even though we tried to preventing it.
At the end of the day I may be right, I may be wrong, but I share this hoping I am one or the other.