Therefore, we have to be optimistic, easygoing and enjoy our beautiful lives. That is the real meaning of happiness. Talk is cheap, but implementing this theory in real life is hard. Our behavior will be better. Looks hard, but it is not impossible.
Life is strange.
Everybody has his or her own problems. 80 out of 100 experiences might be bad experiences. But I believe the bad experiences is not really that bad, since we can learn from them. Therefore, in an unfortunate condition, we should be able to take a look to ourselves, and laugh. Life might not be so hard if we were able to laugh at it.