I have seen people who gets dissappointed after failures and start to live life as it goes
They don't try to change what happens in their life. They leave everything on fate. Whatever good or bad happens in their life, they just put all blame on their fate. I have heard it that:
If you are born poor, that's not your fault. But if you die poor, it is your fault
You are actually the one who can change fate of him/herself. If you get dissappointed, you won't get anything out of this life. So keep trying to make your life as you want it to be. You are responsible for the type of end of your life.