One always starts work with the subject, no matter how tenuous it is, and one constructs an artificial structure by which one can trap the reality of the subject-matter that one has started from.
In other words, a person who is fanatic in matters of religion, and clings to certain ideas about the nature of God and the universe, becomes a person who has no faith at all.
In practical matters the end is not mere speculative knowledge of what is to be done, but rather the doing of it. It is not enough to know about Virtue, then, but we must endeavor to possess it, and to use it, or to take any other steps that may make.
Successful entrepreneurship is ultimately a matter of flair. But there is also a fund of practical knowledge to be acquired and, of course, the right legal and financial framework has to be provided for productive enterprise to develop.