Successful people don't need to work hard. But there must be a careful and focused on the work done so far to understand clearly in all aspects so far as the specialist in real.
Successful people do not have to work hard always. But there must be a conscious and focused on the task at hand. Until a thorough understanding of all aspects that are truly expert in that.
Successful people don't have to work hard continually. But the attention and concentrate on the job. To have a complete understanding of all aspects and is an expert in it.