Yesterday, I read a Blog written by friend. It reminded me of something.
The fun of life is that you will never know what is going to happen tomorrow;
and the key of life is that you should learn to how to make choice independently.

Everyday, we were involved in various situations and matters, for this or that reason, many of them are not expected to happen. However, we have to accept or change it. That's why many people choose to adapt themselves to the society while the rest spare every effort to change the world. Just a matter of choice.

Here's another essay "Choices" for everyone to learn from:

Each morning，I wake up and say to myself "Hey，you have two choices today. You can choose to be in a good mood or you can choose to be in a bad mood." I choose to be in a good mood. Each time something bad happens, I can choose to be a victim or choose to learn from it. I choose to learn from it. Every time someone comes to me complaining I can choose to accept their complaining or I can point out the positive side of life. I choose the positive side of life.