Acceptance is not a state of passivity or inaction. I am not saying you can't change the world, right wrongs, or replace evil with good. Acceptance is, in fact, the first step to successful action. If you don't fully accept a situation precisely the way it is, you will have difficulty changing it. Moreover, if you don't fully accept the situation, you will never really know if the situation should be changed.
Of course there is no formula for success except perhaps an unconditional acceptance of life and what it brings.
You have to know how to accept rejection and reject acceptance.
Productiveness is your acceptance of morality, your recognition of the fact that you choose to live--that productive work is the process by which man's consciousness controls his existence, a constant process of acquiring knowledge and shaping matter to fit one's purpose, of translating an idea into physical form, of remaking the earth in the image of one's values--that all work is creative work if done by a thinking mind, and no work is creative if done by a blank who repeats in uncritical stupor a routine he has learned from others--that your work is yours to choose, and the choice is as wide as your mind, that nothing more is possible to you and nothing less is human--that to cheat your way into a job bigger than your mind can handle is to become a fear-corroded ape on borrowed motions and borrowed time, and to settle down into a job that requires less than your mind's full capacity is to cut your motor and sentence yourself to another kind of motion: decay--that your work is the process of achieving your values, and to lose your ambition for values is to lose your ambition to live--that your body is a machine, but your mind is its driver, and you must drive as far as your mind will take you, with achievement as the goal of your road--that the man who has no purpose is a machine that coasts downhill at the mercy of any boulder to crash in the first chance ditch, that the man who stifles his mind is a stalled machine slowly going to rust, that the man who lets a leader prescribe his course is a wreck being towed to the scrap heap, and the man who makes another man his goal is a hitchhiker no driver should ever pick up--that your work is the purpose of your life, and you must speed past any killer who assumes the right to stop you, that any value you might find outside your work, any other loyalty or love, can be only travelers you choose to share your journey and must be travelers going on their own power in the same direction.