SUCCESS IS BY HARDWORK AND FAILURE BY DESTINY 
Now for those who do not belive in destiny.......just answer these
1. Those who die in blasts, earthquakes, accidents(not due to there mistake)...they r at that place because of they control there life or DESTINY?
2. Few miss the flight and that crashes...then what is that they knew it before hand or DESTINY?
There r so many instances..everthing in our life cannot be controlled by us. Else we would have had solution for everything...isnt it?
Somethings happen in our life...irrespective of our actions.....and thats DESTINY....