Here let us refer to that law of the mind which is the same as is the law in connection with the reflex nerve system of the body, the law which says that whenever one does a certain thing in a certain way it is easier to do the same thing in the same way the next time, and still easier the next, and the next, and the next, until in time it comes to pass that no effort is required, or no effort worth speaking of; but on the contrary, to do the opposite would require the effort. The mind carries with it the power that perpetuates its own type of thought, the same as the body carries with it through the reflex nerve system the power which perpetuates and makes continually easier its own particular acts. Thus a simple effort to control one's thoughts, a simple setting about it, even if at first failure is the result, and even if for a time failure seems to be about the only result, will in time, sooner or later, bring him to the point of easy, full, and complete control. Each one, then, can grow the power of determining, controlling his thought, the power of determining what types of thought he shall and what types he shall not entertain. For let us never part in mind with this fact, that every earnest _effort_ along any line makes the end aimed at just a little easier for each succeeding effort, even if, as has been said, apparent failure is the result of the earlier efforts. This is a case where even failure is success, for the failure is not in the effort, and every earnest effort adds an increment of power that will eventually accomplish the end aimed at. We _can_, then, gain the full and complete power of determining what character, what type of thoughts we entertain.