Why try?

i really dunno whats the point in trying sometimes. Why do people try to achieve things that they're not sure of even getting? In these cases there may be some hope of getting what u want, but i think statistically, most of the time it ends up in failure. That's my experience anyway. i just want to give up trying on things that i'm not sure of getting. It hurts more often than not. i think its stupid of me to keep trying so hard. Trying only proves the existence of hope and i already know that hope is just wishful thinking. The more i try, the more pain just comes my way. It's really stupid. At school and even at home we're always told to try our best. Although thats intended to be a good thing (our parents and teachers want us to be educated well), it affects how we behave in the real world. For everyone to keep trying so hard for things that they may never get; it creates so much sadness and despair in their lives. It's such a cruel world.