Although you've tried

so hard, you will somehow fail.why?well the first reason is because no human is perfect but there's another reason for why we fail. it is because we want to learn.

failure doesn't mean it's the end of something. if we look through the dictionary, failure means "an act that fails".yes, you fail to do something but it doesn't mention that its the end of an act. so to me, failure is not an act that fails, its an event that enables us to be better or turns us to worse.why so?

failure is caused mainly by carelessness. when you care less about something, you tend to neglect it. and once you neglect it, it is no longer your concern. and what happens when it is no longer your concern?it tries to make you concern about it! weird statement eh? well let me put you into the situation. maybe then you'll understand.

you are studying for a paper, calculus per say and you think that you have no problem with the first chapter so you care less about it. you start concentrating on the second chapter and since your level of concentration is low, you neglect the first chapter because you think you have no problem with it. so when you've neglected it, it is no longer your concern. but here is the fun part. you enter the exam hall, you open up the question paper and BAM! the first 3 question is from the first chapter which you thought you have no problem with it,thus you cared less about it and eventually neglected it. and when that happens, you are indeed concern about the chapter which is, well, its a bit too late buddy.

so here's the flow:
care less > neglect > no longer concerns you > the thing gets back to you

and thus, a failure has occur.

take note that this "failure" is now the chance for you to be better by not repeating the same mistake but it's also a chance for you to be worse by repeating the same mistake that you did. and oh yeah, repeating the same mistake is considered the most stupid thing that you can ever do.

One who forgets history is bound to repeat it

now don't tell me that you've done so many mistakes that you can't remember them all, thus you repeat it over and over again. we use only 3% of our brain during our lifetime. use a bit more shall we?