Learn to be a servant and then you will be fit to be a master.
We are responsible for what we are, and whatever we wish ourselves to be, we have the power to make ourselves. If what we are now has been the result of our own past actions, it certainly follows that whatever we wish to be in future can be produced by our present actions; so we have to know how to act.
To succeed, you must have tremendous perseverance, tremendous will. “I will drink the ocean”, says the persevering soul; “at my will mountains will crumble up”.