Exactly what is the futue?

Is it some mysterious cosmic force, that no matter what we do the outcome has already been carefully caculated? Or is it something that just happens along with your decisions, and mistakes? Why try if everything is already planned out? why bother if your mistakes are what mostly makes up our futures? Our successes, our achievements, it all means nothing compared to our mistakes.

Our mistakes are what people remember the most. Forget the cure you found, or the lives you saved, If you fucked your wifes sister, thats what people will remember when you die.