對未經歷過的人來說，就像夢境。對經歷過的人來說却是生活。

One thought often puts my other related thoughts to an end: These terrible things happened to our parents in the past, and will almost surely happen to our children in the future. And this is true for all peoples specifically including those doing these things to others at a certain moment in the ever-ongoing history. Knowing this, how come people still do these terrible things to others？