Although I do agree that perseverance is one of the key factors in success, it is a virtue that requires a high level of discrimination to utilize effectively in all situations.
This is because one must also know when to change directions, try another tactic, or even give up because you may discover that the path you have chosen does not actually lead to your goal.
And yet pure stubborn perseverance is probably effective in the majority of endeavors :-)
RE: The Value of Consistency and Perseverance