No matter how hard one tries, something will never be possible to understand.
Men will never understand the complexity of women.
Women will never understand the simplicity of men.
No one will ever understand why exactly the sky is blue.
Technically blue is relative, so who really understands blue?
On a personal note, there are numerous items I will never understand.
Why is he only nice at certain times?
Why does she stay with him?
Why does he sometimes act like if I leave his world will end?
Why does she think he has changed?
Why in some instances does he look straight through me?
Why does she continuously cheat on him?
Why will he put himself through embarassment just to make me happy?
Why can she not tell the truth?
Why does his smile make my heart melt?
Why does she always find it necessary to go back to him?
Why could I stare at him forever and him not notice me, but as soon as I ignore him, I'm the most interesting thing in the room?
Why should she have to sacrifice for what she wants?
Why doesn't he just tell her how he feels, regardless of the consequences?
Most of the questions I will never get an answer to. A few may decide to ease my mind. However until each people takes that step to answer the question dedicated to them, I can't complain.