A thought just came into my mind randomly: There are always two sides in one thing.
For example, someone win a lottery and become very rich. This is a good thing as this person no longer have to worry about money. However, there could be some negative things following too, like relatives want to borrow money, whether to borrow or turn them down.
Another example might be: an angry customer called in and complain about faulty product. That’s a bad thing. However, the staff handled the situation so well that the company gained a royal customer.
So, we could see that there are always two sides for the situation, depending on how we see the situation, how we handle it and our ability to tackle the issue.