Make sure that the career you choose is one you enjoy. If you don't enjoy what you're doing, it will be difficult to give the extra time, effort, and devotion it takes to be a success. If it is a career that you find fun and enjoyable, then you will do whatever it takes. You will give freely of your time and effort and you will not feel that you are making a sacrifice in order to be a success.
The reason can only be this: heroic poetry depends on an heroic age, and an age is heroic because of what it is, not because of what it does.