No matter what misfortune or setback in your life, you should face it with a positive smile. The hard to avoid in a persons life will be affected by some unexpected blow, when things have happened, and cannot be redeemed, is the best way to learn to forget, change the mood, dont immersed in the endless pain. Some of the pain is imposed by external forces, but more pain is optional. For example, forcing oneself to recall the painful past is to inflict pain on oneself. Life is only a few decades, but we often waste a lot of time, worrying about some unnecessary things, what a terrible loss! In addition to being unable to change the past, there are many things we can change, including our present and future. So, we should change the Angle, change the thinking, change the mood to live.