The sound of one hand clapping...is similar to feeling of hopeless in one sided love; when you love someone that can't or won't love you back...it is resulted to one hand clapping. However, Have you ever experience a bad marriage and a crazy divorce, and don't ever want to be hurt again...Have you experience so many bad relationships and been rejected so many times in the past that don't want to take that chance again.
It is clearly the sound of one hand clapping when the one-sided love commonly occurs, when a relationship or marriage breaks, and one person moves on, while their spouse constantly thinks of them and attempts to win them back. The pain of this situation will be horrible that can useless someone are in a victim of it.
I know it is very difficult situation to be in. Because it will cause you a lot of frustration when it feels like you're the only one trying to make it work. Absolutely because person, who doesn’t care for your emotions, how can waste your emotions for him/her one side love is just like day dreaming. It is a practical answer of one hand clapping without any realistic sounds.