Extend it by enterprise and industry.

Study it as you would a profession.

Learn everything that is to be known about it.

Concentrate your faculties upon it, for the greatest achievements are reserved for the man of single aim, in whom no rival powers divide the empire of the soul.
_Better adorn your own than seek another's place_.
Go to the bottom of your business if you would climb to the top.
Nothing is small which concerns your business.

Master every detail.
This was the secret of A.T.