Assignment4 Akihito Ogawa

I learn a porisi from this video. It is "We Should consider sad or bad things as benefit things".
In this life , there are many unhappiness things. We may think it is harmful for myself. However, all of bad things isn't exist. For example, I fail at a test. I throw away it's paper, this event is only it. If I review wrong questions, I can learn many good things for study.
We should take a good side in anythings.