If you have not even a little imagination, you are simply a brute. So you must not lower your ideal, neither are you to lose sight of practicality. We must avoid the two extremes.... You must try to combine in your life immense idealism with immense practicality.
What is success? I think it is a mixture of having a flair for the thing that you are doing; knowing that it is not enough, that you have got to have hard work and a certain sense of purpose.