pretension
The most difficult thing in being a parent: It is easier for the kid to "pretend to be" that to "really be".
I understood this just by observing a few parents(including mine) and kids(including me). And since I am not a parent, I don't know how it feels like to be one. But I believe, this is a serious impediment to understanding.
But you know what ? It is easier of the parent too, when the kid is sold to the idea of pretension.