People always hope they will find happiness in their lives.
But after they get so much happiness,
They easily forget about those happiness.
And when it comes one calamity,
People will curse,
They will remember that calamity for the rest of their lives.
So why you always ask for happiness,
if you'll only forget it?
But why you always remember one calamity although it's bad memory?
Isn't it better to remember one bad thing,
Instead of forgetting much happiness?